ANNEX, Prepaid Korea Roaming SIM Card

This SIM Card is valid for USA Only!
This SIM Card is valid for Shipping products Only!
Not Available for collecting SIM at pickup points.

Free Domestic & Int’l Shipping!


  • Unlimited Int’l calls to/from USA, Unlimited Local calls, Unlimited Texts, and Unlimited Data. Surf the web freely!
  • Roaming Service by setting up Call forwarding!
  • Blazing Fast 4G LTE Data Speeds on Korea Telecom (KT) Network!
  • Good Only for Int’l & Domestic shipping!

Perfect for

  • Visitors who need access to Unlimited Int’l voice calls to/from USA, Local Calls, and Data
  • Visitors who want the freedom to activate SIM on their desired date
  • Visitors who would like to have SIM delivered to their doorsteps (Users do not have to bother with the hassle of trying to find a local Korean SIM card vendor upon arrival)

Data Speeds

  • 4G LTE Data Speeds : Average Download 120 Mbps
  • After 10GB of usage, you can use extra 2GB
  • After 12GB of usage, Data speeds limited 3Mbps
  • Service Provider : ANNEX TELECOM, a Korea Telecom (KT) MVNO


  • Tethering is available.
  • Unlimited Local calls, Text and data are available.
  • Allows Int’l calls to be made at no additional costs to/from USA
  • Not available for Voice Talk by using apps such as Skype, LINE, etc.
  • Voice Talk via apps is available only when user is connected to Wi-Fi Zone.

Free Int’l & Domestic Shipping! Promotional Price

Pass Promo Price
7-Day 40 USD
10-Day 47 USD
15-Day 60 USD
This is a special promotional price which includes free int’l & Domestic shipping.
To activate on your desired date, you need to register SIM at least 1 Day(GMT+9:00) before use.
SIM Credit expiration is counted based on your registered activation date.
SIM Card Expiry Date : 30 April 2018
Surtax 10% included.

Order Process

1. Place an Order
Choose “Int’l & Domestic Shipping” Option as the Pickup Location.
Inform us of your shipping details in order Notes Box.
Recipient’s full Name, Contact phone Number, Recipient’s full address (Street, City, State, and ZIP code) in English.
Please check 4 points on your phone before ordering.
Is the phone unlocked? Phone’s Compatibility? SIM Size?
Delivery Time?
This SIM Card is valid for foreign visitors only.
If user is of Korean nationality, you should have a permanent resident card or student visa.
2. Make a Payment
Users can pay with PayPal account or Global Credit Card : Visa, Master American Express, Discover.
Users can pay with a credit card as a guest on the PayPal Page if they don’t have a PayPal account.
After receipt of payment, users will receive confirmation via e-mail.
If confirmation email is not received, please check your spam or junk email folder or notify us by email, tap here!.
3. Shipping
Worldwide Free shipping available from Seoul, Korea.
Delivery Time is expected to take as follows based on business days after receipt of payment.
For Int’l Shipping : between 14 and 21 Business Days
For Domestic Shipping : 2 Business Days
Delivery times may vary during peak periods.
Delivery time does not include weekends or holidays.
After shipment of SIM, users will receive tracking information by email to check the shipping status.


4. Download App & SIM Activation
To register SIM, user needs to register SIM for the desired date at least 1 Day(GMT+9:00) before arrival in Korea.
If user is of Korean Nationality, user needs to register passport and permanent resident card or student visa at a same time.
To use the unlimited international call feature, and roaming service by getting all calls to users local US phone forwarded to Korea, user needs to download App, ‘Korea roaming’ in App store or play store.
To use roaming service by call forwarding, users need to apply for call forwarding service with their local US mobile service provider at least 1 Day(GMT+9:00) before arrival in Korea.
5. Getting Started 
To enjoy all unlimited features, please do the following.
Insert the SIM into your mobile phone.
Go to the Setting app to turn on/off mode.
Check the KT APN Setting
Check KT 4G LTE Signal
See user’s manual for further instructions.

Order Now !

Returning customer? Click here to login
  • KSIM2  (pass: 7 Day)  —  $40.00
  • KSIM2  (pass: 10 Day)  —  $47.00
  • KSIM2  (pass: 15 Day)  —  $60.00

Billing Details

Additional Information

Your order

Cart Subtotal $0.00
Order Total $0.00

Checking My Phone

Unlocked Phone?
To enjoy Prepaid Korea SIM in Korea, you must have an unlocked phone.
To find out if your phone is unlocked, Tap Here!
Customers using phone activated in USA, Canada, Japan, have to make sure that your phone should be unlocked before ordering.
SIM Size?
Nano and hybrid(standard/micro) are Available.
If you’re unsure which SIM size you need, Tap Here!
Compatible Phone?
Your phone must support on one of GSM N/W frequencies below.
4G Bands : Band1(2100MHz), Band3(1800MHz), Band8(900MHz)
3G Bands : HSDPA 2100MHz/HSDPA+
Not Supported TD-SCDMA,TD-LTE Bands
To find out if your phone is compatible, Tap Here!

About Payment, Tracking information

How to Pay?
Even if users don’t have a PayPal account, one can pay on the PayPal Page as listed below.
Choose “Pay with my credit or debit card” instead “Log in”.
Fill in your billing details and hit “Pay” button.
To change language from Korean to English, choose the language option in the PayPal page.
How to check shipping status?
After shipping SIM, you will receive tracking information in an email and then you can check the shipping status of your item as follow.
Visit to the shipping company’s website (Korea Post Website).
Choose EMS and Track/Confirm on the Menu.
Input tracking number to search it.

About Using  App, SIM Activation

How to install App?
Go to Play Store or App Store.
Search for ‘Korea roaming’ on their store.
Install App on your mobile phone.
How to activate SIM?
SIM Activation should be requested by using App(‘Korea Roaming’) at least 1 day(GMT+9:00) before arrival in Korea as follows.
Open App.
Choose language.
Agree to Terms & Conditions.
inPut New phone Number provided by “Korea Roaming”.
Input last 3-digit of SIM Card Number.
input Service Start Date, email address.
Upload your passport page included photo & details and Click ‘register’ button.
Customer Service Center
This is the Prepaid Korea Roaming SIM Card powered by ANNEX TELECOM.
Contact Phone Number (ANNEX TELECOM)
82-1544-4344(overseas), 1544-4344(domestic)
If you have any further questions, please call above number.
Working hours
Mon ~ Fri : 09 am ~ 08 pm(12 ~ 1 pm Lunch break)
Weekend & Holidays : 09 am ~ 06 pm
How to use unlimited int’l Calls(USA Only)?
To make Int’l calls from Korea to US, users must use the App (‘Korea Roaming’).
Open “Korea Roaming” App.
Enter US phone number (area code and number without country code) on App’s dialer.
Hit the ‘Call’ button on App’s dialer.
How to use Roaming service via call forwarding service?
When using “Korea Roaming” SIM card, users will be provided with a temporary US number. This number can be verified two ways. It will be visible in the upper right corner of the “Korea Roaming” App dialer once the Korea Roaming App is opened. Or once the “Korea Roaming” app is opened, go to setting in the lower right corner of the screen. The local Korean number, and the temporary US number will be displayed. Users must set up call forwarding with user’s local US carrier to this temporary US number.
With this ‘connecting phone number’, users need to apply for call forwarding service to with their local US mobile service provider at least 1 Day before arrival in Korea.
Users can receive all calls to their local US phone, by this optional service, anytime anywhere in Korea.

How to start SIM?

Power off your phone.
Insert Prepaid “Korea Roaming” SIM.
Turn on the phone.
Go to the Setting in your phone’s menu
Turn off WiFi , Airplane, Bluetooth, data roaming mode
Turn on Cellular Data Network mode
Setting correct KT APN in your phone as show below
Connection Name : KT
APN Name :
Server / MMSC : http : //
MCC : 450 , MNC : 08
If you are not sure how to use these settings,  Tap Here!
See a signal?
Yes : Great, Enjoy unlimited voice calls, data, and texts in Korea!
No : If your phone is not locked, you may want to check the coverage in your area and need to power off 3 times to connect the KT network.

Return & Refund

Send us email promptly if you want to cancel your order.
According to Order Status, it is subjected to following our policy.
Before Shipping : No cancellation fee
After Shipping: USD $10 Handling fee will be charged.
30 days after purchase: Non-Refundable
You will get a refund according to the cancellation policy.
Once Prepaid Data SIM opened, it is strictly not refundable once sold.
Refund of balance will be paid back by PayPal account.
Return Policy
You can return your order within 30 days of purchase.
To receive a refund of the purchase price of your Prepaid Korea SIM Card, you must return it (with original packaging and all contents) within the Return Period in undamaged condition.
Your return is subject to a handling fee. Refunds for your order will not be processed until we have verified your order was received by our shipping company.
To return an item, ship SIM in its original packaging to:
ATTN : NeoKOSIM (Sunae Chung) Return
133-2601, 20, Hagui-ro,Dongan-gu, Anyang-si, Korea, 14044


Review of Breakdown

Worth vs. Price
Simple, Easy to use & free Shipping
Reliable Mobile Network



User Rating: 4.81 ( 9 votes)

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