Integrated Telecommunications Carrier SEJONG TELECOM · SEJONG TELECOM COMPANY BRIEF 3 MVNO wman e...

All information is confidential and was prepared by SEJONG Telecom; it s not to relied on by any 3rd party without SEJONG Telecom’s prior wirtten consent.

Integrated Telecommunications Carrier

SEJONG TELECOMThe Greatest ICT Platform Partner

SEJONG TELECOM COMPANY BRIEF

Milestone

20191992

1992

1997 20082002 2012 20172000 2011 20162007 2015 2018

2000

2012

2002

20082016

2018

1997

2001

2007

2011

2015

2017

2019

Incorporation

Listed onKOSDAQ

Started MVNO Service ‘snowman’

OpenedYeoksam IDC

OpenedBundagn IDC

Official Partnership with AWS ‘Direct Connect Service’

Started ‘SEJONG CCTV’

Started APT preventionservice ‘BreachWall’

‘Joil ECS’ incorporatedinto SEJONG Group andstarted business ofAll Electrical & Communication construction

Nationwide high-speed telecommunications network license acquisition

Opened C2CSubmarine Cable& C2C LandingStation in Busan

SEJONG Telecom incorporated into SEJONG Group

ONSE Telecom incorporated into SEJONG Group

Changed name to SEJONG Telecom Inc.Integrated telecommunication business of SEJONG group

Official Partnership with‘MS Express Route Service’

Private Blockchain Main-net 'BlueBrick' Launch

'Joil ECS' merged into SEJONG Telecom

Acquired 'CueBiz'serves The Used & Refresh MobilePhone Distribution

Video Commerce &'Beauty' Platform 'wallaVU' Launch

Official Partnership with ‘Google Cloud’

SEJONG TELECOM COMPANY BRIEF 1

SEJONG Telecom is a national key telecommunication business operatorwith 12,800 km of self-network listedon the Korean stock market.

(KOSDAQ #036630)

The Greatest ICT Platform Partner“”


We provide inteqrated ICT servicesA new development by spurring new,new businesses and securing smart technologies such asBlockchain & Data and A.I.

Biz Portfolio

Data/Network

Wire[Voice]

Wireless[MVNO]

AllElectric

Construction

E-Commerce

ICT Solution

Blockchain

Connectivity


MVN

Osn

owm

an

Video Commerce

Beauty Platform

wallaVU

International Calls008/00365

Represented N

umber

1688·1666·1668

Virtual Num

ber

(VNS, 050)

Leased Line

(Domestic, Internet

International)Data Center(IDC)

Paym

ent S

olut

ion

SEJONG P

AYVi

deo

Surv

eilla

nce

SEJO

NG

CCTV

Secu

rity

Sol

utio

nB

reac

hWal

l

Uni

fied

Com

mun

icat

ion

SEJO

NG

Smar

tbiz

BaaS, Financial, Alliance etc

Main net BlueBrick

Mart Shopping

MARTYO

Auto Translation

Social Network

Global Friends

Mobile FaxThankyou Fax

Global Acceleration BAS

Cloud

AWS Direct Connect MS

Azure ER

Google Cloud

Biz Message

WIDESHOT / KAKAO BIZ

All Electric Construction

& Communication

Voice

E-Commerce

LifestylePlatform

Blockchain

ICTSolution

DataNetwork

Electric

Mob

ile

SEJONG Business


SEJONG’s decentralized main-net is aimed to create diverse values and infinited possibility of potential and to build a sharing economy.

Based on the trust and innovative technology,various blockchain-based projects are beingintroduced step by step.

· Service Oriented Private Mainnet “BlueBrick” (BaaS)· Government Project (Smart Education, Regional Currency, Smart Port)· SCT (SEJONG Token Community) Service· Global STO (Security Token Offering) Platform· Global Financial Service · New Future, Eco-system based on sharing and cooperation

Scalability Speed Security/Stability

SmartEconomy Compatibility

BLOCKCHAIN x NEW BUSINESS


SEJONG Telecom provides its own infrastructure and transaction intermediation platform.All participants provide andshare individual assets including ideas, technologies and contents.We will share all returnwith all participants.

Digital Asset Value Chain

SEJONG Sharing Economy Platform

Contents &Entertainment

PublicSector

Logistics &Distribution

Finance

Utilities

Media

E-Commerce

Bio &Healthcare


Unlimited expandable & Service-orientedPrivate Blockchain Main-Net

BlueBrick is a customized type of Private BlockchainMain-net for each service and is capable of unlimited expansion.

This main-net is capable of decentralized processingthrough Multiple SideChain for each service anddecentralized data can be exchanged through theInter-Exchange Chain.

Thus, it guarantees high speed due to parallelprocessing of transactions by structural decentrailizationand effectively creates Blockchain structures suitable for the service.


BlueBrick Brand Story

Assemble

New Name for a New Future made by SEJONG Telecom

‘Blue’ is an expression of Stability, Reliability, Sincerity, and Responsibility.‘Brick’, the representative brandmark, is a principal unit of Blockchain.

Decentralize ECO System BlueBrick B.I

‘Brick’, icon of BlueBrick, brings together SEJONG’s outstanding network operation know-how, technology, facilities, and symbolized the key values and the future ofour platform

The values establish a service-oriented platform that enables discovery of diversified possibilities by expanding from the center and there by realizingdigital asset fluidity

BlueBrick’s values are ultimately generating a new eco-system of sharing andco-existence by connectingand expanding various principals

SEJONG TELECOM’sPrivate Main-Net in the form ofBlockchain as a service(BaaS)


About BlueBrickBlueBrick seeks to become a new eco-platform based on co-create values, co-existence, and pioneering collaborative business agreements with partners. All participants shared all benefits

• 'Blockchain as a Service' Platform applied Multi-SideChain structure• Private mainnet and Open Platform based on thecutting edge telecommunication infrastructure• Supporting to develop the value-added service• Building trust and create values in data-driven society

Value-added Network

•Marketplace for direct trading in digital assets

•Accurate 'Contribution' measurement and fair returns benefits

•Creating an autonomous token economy

•Providing an equitable network environment that is transparent to ourselves and partners

• Hybrid Computing Environment→ Support to develop the value-added services

• Efficient use of resources through Inter exchange chain links→ Supporting inter-operability between mainnet

• Deploying global multi-node based on system redundancy

• Improving transaction processing throughadopting the latest consensus algorithm, POA

• Sync on the partner's service mainnet,aimed at standard-based middlewareinterworking

Sharing Economy

* AI Deep-learning Educational center, Edge Computing Data Centers, etc

BlockChain Business

Trusted Open Platform


VIsion: Co-Creation for Connectivity Ecosystem

Token Creator

Block Explorer

Inter Exchange

Multi Wallet

Smart Contract REST API Engine

Key Management (HSM) Network (IDC) Security (Network APT, Layer 7 Switch)

Tools

App

Mainnet

Infra

Hyperledger Ethereum

Finance

▫Investment▫Consulting▫Accelerating

Business ServiceGoverment

RegionalCurrency

AppSmart

Education

ContentsSmartPort

Game

STO Platform

Global Finance

SCT Platform

App

App

App

App

External Mainnet

Digital Asset Exchange

API API

BlockChain Business


BlueBrick Key Points

SPEED

Speed

SecurityStabililty

Smart Economy

Compatibility

Scalability

· Multiple SideChains Structure- Unlimited expansion through the generation of a sidechan for each service group- Guaranteed quick processing speed thanks to parallel processing of transaction- Minimized interruption from other service (speed, server traffic, and safety)

· Block generation cycle of 1 sec

· Guaranteed minimum of 1,000 TPS Can be added sidechain & support up to 10,000 TPS

· Improvement of transaction processing speed through PoA

· Ethereum-based blockchain· Data Centers (IDC)

- placed in Gangnam/Bundang/Busan- Operation knowhow and professional manpower

· Security systems at an equivalent level of financial sector

· Inter-Exchange Chain & Open Platform- Exchange function between inter/external data, coins/tokens, and platforms

· No Transaction Fees· New business development supports for partner

- Hybrid computing environment- Technical supports (dApp & Open API developments)

· Autonomous Token Economy


BlueBrick Core Concept

Unlimited expandable & Service-oriented Blockchain Main-NetBlueBrick is designed as Multiple SideChain structures that offers differentiated competitvenessin Scalability, Compatibility, Speed, Reliability and Smart Economy.

can be added parallelizedSideChain according torequired performance

can be exchangeddecentralized data,coins, and tokens

Side-Chain #1(Dapp)

Service #3

Service #5

Service #6

Service #7

Service #N

Service #1

Service #4

Service #2

Side-Chain #2(Dapp)

Side-Chain #3(Dapp)

Side-Chain #N(Dapp)

TokenExchange

TokenExchange

Multi Chain

Inter Exchange Chain

Bitcoin

Etherium

EOS

External Platform


BlockChain Business - Development Strategy

Commercialization

Alliance

Financial Platform

Commercialization2

Alliance4

Financial Platform

3

BaaS Platform

BaaS Platform

1• Leverage SEJONG's own network infrastructures

• Unlimited expandable Private Blockchain Mainnet based on Ethereum, 'BlueBrick'

• Providing a Corporate Blockchain mainnet

• Hyperledger Fabric(SI)

• Converting the existing app by SEJONG or Partners into a dApp

• Student Info Management System(NIPA) Shipping Container, etc

• Consultation and task collaboration with local government, Gwangju, North Chungcheong, Gangwon, Gyeonggi and Seoul, etc

• Partner Recruitment applied BlueBrick-Combining Blockchain technology toexisting partners' Business model

• Building alliance with a startup that B-Brick has invested -Investment, consulting, marketing, infra, etc

• ICO Investors, prospective business operators wish to ICO list, ICO-friendly exchange platform

• Financial Service Platform - Payment, exchange, and transfer Sejong's coins

• Digital Asset Exchange Platform (STO) - Real estates, Arts, and unlisted stocks

• Financial derivatives on Blockchain - Staking custodied assetsKey

Key Strategy: Digital Asset Management Platform


BlockChain Business

tudent Information Management Systems

eal Estate AssetsInvestment Platform

Logistics & Port Management Platform

Converting the existing app.into a dApp

Old Diesel Cars Management Platform

Regional Currency Platform

Agricultural Supply Chain Platform

Transparency and Stability (Academic info/informal education/External instituition)

Investment platform for general investorsto invest in token issued by a real estateinvestment company

Adopting Blockchain and IoT technologyin container shipping. Real-time registrycargo checks faster, and minimized the riskof penalties for custom compliance

Development of a decentralizedblockchain app own by SEJONG Telecom (Point TongTong, Global Friends,Thank you Fax)

Management of operating path and time with Blockchain and IoT technology (Emergency reduction measures)

Merits of the 'Prepaid electronic payment system' based on the existing IC Card & Blockchain-based security

Records of the entire process from the production stage, process, distribution, and consumption in the decentralized storage (Guaranteed quality info of agricultural products)

SmartEductation

ShippingContainer Real Estates dApp Old Diesel

CarsAgriculturalSupply Chain

RegionalCurrency


Owns Network of 12,800km(76% of the 17,300km optical fiber cable installed nationwide,it provides lines and tracks to SKT, KT, LGU+)

Total capacity of 2,202Gbps

100G/10G/2.5G DWDM and MSPP(Capital, 6 major cities, 38 provincial cities)

· Connected US, Europe, Middle East, Asia, Australia, etc.· Global Partners : PCCW, TELSTRA, GCX, Singtel, NTT etc.· International PoPs : Hong Kong, Philippine (and Japan within 2018)

253Gbps Domestic & 14Gbps International

Data centers in Yeoksam, Bundang and Busan

Nationwide Optical Cable

IP Backbone Network

Nationwide Transport Network

Submarine Cable & Overseas POP

Internet Exchange Network

IDC

C2C Landing Station in Busan

Yongin

Bundang

Balan

Dangjin

GonamSeosan Asan

ChungyangBoryung

Anjung

Jeongeup

Gumi

Gyungsan

Wonpyeong

Gimpo

Daejeon

Ansan

Yeouido Dongdaemun

Goyang

Uijeongbu

Suwon Shingal

Icheon Wonju

Chuncheon

Pyeongtaek

Boeun

Cheongju

Youngdong

Geumsan

Hapcheon

Jangsu

Jinju

Jeonju

Suncheon

Jinryang

Gimhae

Eonyang

Milyang

Hwanggan

Goesan

Mokpo

Gwangju

BuyeoYeonmu

Gyeongju

Pohang

Ulsan

Busan

Daegu

Hongseong

Seoul

Gongju

EumseongJincheon

Anseong

Anyang

Bucheon

Incheon

Ganggyung

Chungju

Yesan

Jeungpyeong

Jochiwon

Seocheon

Yeosu

Masan

Seomyun

Cheonan

SEJONG Telecom Network - Own Facilities


SEJONG Telecom’s Global PartnersHutchison, Vodafone, PCCW, Verizon, KDDI, Softbank, Telstra, China Telecom, China Unicom, E.T.C

International Submarine Cable Network

for Asia & Europefor USA

Hawaii

Korea

HongKong

Malaysia

IndiaUAEEgypt

Jordan Pakistan

Australia

MorroBay

Bandon

Point Arena

Netherlands

Belgium

FranceGermany

U.K

Morocco

PortugalSpain

Philippines

Singapore

Thailand


Leaed Line &Data Network

We make our customers’ work more efficiently by providing customized services.


International Leased Circuit

DomesticLeasedCircuit

IPLC(International

Private LeasedCircuit)

MPLS(Multi-Protocol

Label Switching)

Global Acceleration Service(BAS)

High-SpeedNetworking

(Up to 100G)

CloudMS Azure

Express Route/AWS Direct

Connect

SD-WAN

Data Center(IDC)

BusanC2C Landing

Station

Data Communication


IDC

Data centers selected by Global Enterprise

Dedicated physical & virtual private server with rugged carbon steel structure.Facilities for customers, who want to install and operate in separate working space. Only allowed person is able to enter into the cage due to strong security system.Monitor, log and control what traffic is allowed to traverse in between input & output nodes high-strength against earthquakes.

DomesticLinks

248Gbps

InternationalLinks

15GbpsKAIST

Equinix HK1

SKB SKB

PCCW

LG U+ LG U+

KT KT

DREAMLINEGCX

KISTITATA


Neutral IX

SEJONG TELECOM attracts attention in the global market beyond Korea

Easy connection & Management.Efficiency through reducing data transit traffic & bandwidth costs.Stable data transit & Improvement of quality for end-user’s experience.Global Infrastructure services (Neutral IX business linkage & caching service)

· Nationwide optical cable & internet backbone network (12,800km)

· Direct connect & peering between SEJONG Neutral IX network’s members

· Caching the P2P Traffic in international ISP Network

· Connecting High-Speed network Between Major Data Centers (up to 100Gbps)


Member Name Infrastructure

Multi SO

CJ Hello

10G x 4eaT Broad

D Live

HCN

Indivisual SO

Namincheon

10G x 2ea

CCS Chungbuk

GCS Pureon

JCN Ulsan

KCN Kyumgang

KCTV Jeju

Contents Provicer10G x 4ea

10G x 2ea

SIMPLE & EASY WAY OF PEERING

- SEJONG Telecom Neutral IX network is composed of MOST OF NATIONWIDE so and major contents providers, such as NAVER and KAKAO

- Becoming a member of SEJONG Telecom Neutral network is simple and easy way to link with various ISP & CPs without further efforts.

Cost Saving

- In Korea, Sos are one of important broadband internet providers

- The cumulative market share is 15% pursuing the third place, LG U+ with 18%

- SEJONG Telecom’s Neutral IX will save the SO traffic costs and circuit costs for links up to 15%

MSO/SO

18%

15%

26%

41%

* The members of Content Provider is rapidly expanding/SEJONG Telecom Neutral IX covers whole SO providers.* Source - Smart Choice : http://www.smartchoice.or.kr/smc/smartreport/service_04_client.do - Korea Telecommunications Operators Association (KTOA, http://www.ktoa.or.kr/en-ktoa/03_member/member_01.asp)

Korean market share of internet service providers

SEJONG Telecom Neutral IX member

Neutral IX


Leased Line Connection between data centers and Seoul/Metropolitan area

Offering symmetrical speeds up to 100bps Ethernet.

Allowing you to predictably, securely, and consistently exchange.

Large volumes of data transmission.

High-Speed Connectivity


Attracts Increased Demand via High-Speed ConnectivityWithin/between data centers in Seoul/Metro cities

speed up to 100Gbps Ethernet

Gasan LG CNS(Seoul)

Sangam LG CNS(Seoul)

Dogok KINX(Seoul)

Seocho KIDC(Seoul)

Bundang HOSTWAY(Seoul)

Seocho SKB(Seoul)

IDC

Yeoksam IDC(Seoul)

High-Speed Connectivity


MVNO snowman

No more of burdensome mobile phonebills! The perfect plan for your monthlyplans, airtime, messaging, searchand stream.

www.snowman.co.kr


Recommended Target/

Recommended Plan

Students whofocus on studying

snowman Voice Call 60

Elders who are notactive phone users

snowman Smart 1G

College Studentswho use data a lot

snowman LTE10G 100 Min

Salesman with much call volume

LTE Data Choice 10G

Service Supply60 min. Voice Call

100 Text Messages

30 min. Voice Call

1GB DATA

100 min. Voice Call

100 Text Messages

10G Data

Unlimited Call/Text

10GB Data+2GB daily addition

Monthly Charge

(VAT included)5,500 KRW 9,900 KRW 26,400 KRW 49,390 KRW

MVNO snowman

25

V-Commerce Marketplace where you can buyfun and reliable merchandise withvideo content.

www.wallavu.com


Lifestyle Platform

Viewty PLAY ON! wallaVU!

wallaVU was named by SEJONG Telecom's integrated logistics service brand 'Wallaby' and is a naming highlightingthe distinctive characteristics of the platform, which specializes in the 'V-Commerce' area.

Enjoy shopping with video contentwallaVU is a brand that can sympathize with and understand the diverse daily life of women in 18-24 age.

Integrated Logistics Service(Fulfillment)

V-Commerce


Lifestyle Platform

wallaVU is a V Commerce professional platform made by SEJONG Telecom.

wallaVU offers a vivid video of 18-24 women's diverse beauty routines and know how.

In wallaVU, anyone can become a beauty creator.

Anyone who wants to become a Beauty creator can freely upload their own beauty videos through the 'VU-TV' section wallaVU Creative members can receive video editing depending on the location and equipment of Walla’s home Studio.

Complex and tricky cosmetic choices, now choose from wallaVU.

We provide our customers with quality products that are excellent in quality but low in recognition. wallaVU grows together as a win win platform by providing a fixed sales channel for companies.

Open SNS market in wallaVU easily and conveniently.

Introduce your favorite products to others.‘GGUMIN’ Members can earn sales and wallaVue will proceed with product preparation and delivery.


Lifestyle Platform

wallaVU is a video based beauty commerce platform that breaks away from traditional image oriented shopping platforms.Instead of images and text that may be different from the facts, the video shows how to use the product, features andreviews to provide intuitive information check and enjoyable shopping experience.

Store VU-TV

Lifestyle Platform

Technology is all about making the everyday simpler, easierand conveniently.


Free FAX, Thank You Mobile FaxStamps/Points Saving and Payment All Together! TouchingRegularly Visiting Store in My Hand, MartYo App Tech Reward Saving Market, PointTongTong Communicate with Friends all around the world, Global FriendOur own chat which lasts for 30 minutes, BlahBlah

6 Mobile Applications for making your life easier

Lifestyle Platform


Regularly Visiting Store in My Hand. Mobile Shopping Platform for vitalization of small stores in town and customer’s convenience enhancement via increasing delivery service. Enter address or the store near home. Search the store and shop quickly. Enjoy event, discount coupon and benefits as well as order, pay and delivery. It allows fast and reasonable consumption. Owner App & Customer App in separately.

MartYo

Save certain points when participating in advertisement and quiz event with smart phone .

User can use points by purchasing mobile coupons, charge Cashbee and do donations, and can enjoy saving benefits with entertaining features.

Point TongTong

Get in on Google Play & App Stores!

Send mobile Fax anywhere and anytime.

Simply attach the documents as attached image in your mobile text message.

Receive document will be sent to your private e-mail address. We also provide the ‘Personal FAX number (050).’

Will be useful!· Year-end Tax Adjustment (Jan-Feb) · Tax Return for individual business operator (May) · Insurance Claim

* iOS & Androids apps applicable!

Thank You Mobile FAX

Lifestyle Platform #1


Get in on Google Play & App Stores!

Provides an automatic translation service so people with different culture and language can communicate without difficulties.

Can be friends and share information with people from various countries.

The target customers are who want to learn foreign language via communication, and who want to learn foreign cultures and make global friends .

Free chat service with privacy protection.Anyone can sand a message without the same application

All chats and conversations are deleted afterthe set-up time

Global Friend BlahBlah

The easiest and the most convenient mobile membership service.

Customer’s ‘One-Time Card Touch’ allows saving and coupon usage.

It helps franchises and individual business operators to manage customers easily and do marketing smartly.

· Data collection by visiting customers · Efficient re-visiting promotion (send customized coupon)· Direct communication with customers (Push Message, Event Notice Function)· SNS Linked Marketing: Possible to advertise voluntarily and sequentially

TOUCHING

Lifestyle Platform #2

ALL-IN-ONE Service for Start-ups & Sellers

All-In-One service for business proprietors, SOHO and franchise owners· Virtual/Directory/Toll-Free number· Simple payment, Security solution, CCTV · Customer management.


Increase trust and sales!

Provide virtual number system(050) generated by encryption. Incoming calls are forwarded directly to the phone line.

· Integrate your CRM with your virtual phone system· Optimize your sales processes improving your customer service· Make your business more trust· Great option for those who are on the go or who do not have traditional office space· Easy to separate business from personal life· Custom greeting messages for a welcome & event notification.

Virtual Number 050


Directory Number 16XX && Toll-Free Call 080

1688 ·1666 ·1668Connect dispersed branches and franchises with One Number of Easy 8 Digits.

080 Pay customer’s phone bill at corporate & store.


National Directory Number 1688·1666·1668

Connects nationally dispersed branches and franchiseswith One Number of Easy 8 Digits.Delivers the call to a designated receiver.

· Can be used in all types of phones· Freedom in time and space · Universal usability · Various availability and Convenience · Cost-effectiveness

Main Targets- Financial Institution. Insurance Companies, Shopping Mall, AS Center, Parcel Company, Educational Institution, Food Franchise, etc.


· Send documents conveniently· 050 Fax receiver number only for 2,000 KRW per month· Securely stored up to 10MB a year

SEJONG Web FAX, V-FAX

No More FAX Machine!


· SMS: Short text message up to 90byte· LMS: Long text message up to 2,000byte · MMS: Combination message with multimedia(image & video)

BIZ MESSAGE, WIDESHOT

Send a text message to mass volumemore rapidly and stably


KAKAO BIZ MESSAGE

Notifying TalkSends informative message in a cost-efficiency.Useful in ordering, payments and delivery to KAKAO users. No need to worry about spam message anymore.

Friend TalkMaximize your marketing effectsby sending customized advertising messages to targets.Note that transmission is only possible to users who are on the lists of KAKAO Plus Friends.

FriendTalk

Notifying Talk

Main Targets- Corporations that send mass messages- Marketing, PR, Financial, Educational Institution, Hospitals, etc.


Main Targets- All franchises and sellers need card payments- Phone Order, Visiting/Calling Sales, Mobile/e-Commerce, O2O Service - Pensions/Resorts, Law firm, Pharmaceutical Firms - Parking lots, Gas companies - Service Agency, Distribution Agency, etc

Intergrated Payment SolutionSEJONG PAY

Proceed payment anytime and anywhere!Even if no face-to-face interaction with customers.

· Convenient Credit Card Payment · Safe ARS Payment· Simple SMS Payment · Fast Cash Payment with cash receipt · Transaction information management


Video Surveillance Solution SEJONG CCTV

Make a your life design Safety and Happiness. Enjoy the optimized video surveillance with customization.

· Nationwide visiting service · Smart care service · Various product service · Divided payment

Main Targets- Considering the safety and protection of single elders, children and pets : Daycare center, Kindergarten, Postnatal care center, Pet hospitals, etc- Has many complaints and disputes that needs customer management system - Needs to manage large facilities such as buildings, apartments and factories- Attendance management, stock management, intrusion prevention, etc


Advanced Persistent Threat Solution BreachWall

Blocking of malicious act & data executed without user’s direct behaviors at real-time

Protect your computer network from unauthorized access to a networkand remain undetected for an extended period.Anticipatively blocks malicious behavior by detecting and analyzingall inputs of the user executed and by shutting off overall input-based acts

*Korean name: TrojanCut

Address36, 10-gil, Sangil-ro, Gangdong-gu, Seoul, Republic of Korea

Websitewww.sejongtelecom.net

Integrated Telecommunications Carrier SEJONG TELECOM · SEJONG TELECOM COMPANY BRIEF 3 MVNO wman e...

Documents

Transcript of Integrated Telecommunications Carrier SEJONG TELECOM · SEJONG TELECOM COMPANY BRIEF 3 MVNO wman e...