How do I extend validity expiry of Prepaid Korea SIM Cards?

Hi, Are you ready everything to visit Korea so soon?
Thanks again being with our Korea SIM Cards of NeoKOSIM. 

You can extend validity date with following recharging method while enjoying the Prepaid Korea SIM Cards.

These are all the easy ways you can recharge for your prepaid Korea SIM Cards are listed below.

Before you recharge, please ready to prepare your mobile number you want to recharge and credit card. Global/Domestic credit cards are acceptable.

* How to recharge in Korean >>> Tap here ! 


Please download “WHOMSIM” Apps of service provider KT MVNO ANNEX Telecom co. and recharge before expiry.
* You have to take a action for Validity extension before your using period has expired. Automatic termination is given unless extended by a recharge before expiry.
Recharge amount per day is KRW 3,000.
* 7/10/15-Day plan of SIM are extendable up to 30-DAY including first using date only once.
30-Day SIM plan, it is extendable up to 30-DAY only once.
For example,
When using 15-day Pass and want to extend 3 days more, top-amount is KRW 9,000 (=3 days X KRW 3,000).

* Notice for MY SIM PLUS A
– You will receive text message concerning credit balance if you used up 80% of free 100 mins call, 100 texts credit.
– Data service may be interrupted as your credit balance runs out if you used up all your given call & text credit without additional top-up(recharge).

* How to recharge by using App as following.

- Download the ‘WHOMSIM’ app from the Android Play Store, IOS App Store
- Open “WHOMSIM” App on your phone
- Choose your language
- Choose “Top-up” on menu page
- Choose “Global Credit Card” on menu page
- Put your mobile phone No. to check balance
- Choose Top-up amount
- Put credit card details to make a payment
Text message “completed Top-Up” will be received after payment. 
- That’s all folk!


You are needed to recharge your credit as following instruction given at pickup points if you want to use another 30 days.
* Credit expiry of both SIMs is able to use up to 90 days by recharging each 30 Days from starting date for those who are foreign nationality.
* If Not recharge within 3 days after expired, SIM Service will be terminated automatically.
The amount for extension of MY SIM FREE B is 58,500 KRW(~55.70USD)
* The amount for extension of MY SIM PLUS B is 39,600 KRW(~37.71USD).

How to recharge ?
please refer the instruction as below.

The recharge is made by our partnership Agency Link Korea 링크코리아.

1. By Korean Bank Transfer
– The bank account info for recharge is given at the pickup points.
– As for MY SIM FREE B, You are needed to transfer KRW 58,500(~US$ 55.70) to their bank account.
– As for MY SIM PLUS B, You are needed to transfer KRW 39,600(~US$ 37.70) to their bank account.
2. Please follow the instruction as below in the case of PayPal payment
3. Visit the office of Hongdae Link Korea who is our partnership company.


You can recharge the credit by the unit of 10,000KRW.
Validity period is given 30 days per 10,000KRW. 
You are needed to recharge your credit as following instruction given at pickup points. 
– By CVS (GS25,7-ELEVEN), Bank Transfer,PayPal Request Payment or visit the office at the Downtown Seoul 

When the validity date is expired or no balance is left,
- Calls and data service will be suspended
– Incoming calls is possible for 15 days
– Phone number will be terminated on the 45th since the validity date has expired.


You are needed to recharge (Top up) your credit as following instruction at pickup points.
You have to recharge within expiry date if you want to use Voice service continuously or extend using period for Data.
After expiry date, you can’t recharge or reuse your SIM Card.
Please keep in mind that there is no way to recover after expiry.

How to recharge

1. visit web
2. Click “prepaid SIM”
3. Choose “Voice Top Up” or “Extension of Expiration date”
4. Agree “I consent to all necessary terms and conditions for using kt roaming service.” , “Enter the contract number to check Prepaid SIM” and then click “ check”
5. Click “SELECT Phone Number” and “recharge”.
6. Check your current balance and click “recharge”.
7. Choose the amount to recharge and make a payment.

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