Prepaid SIM in Busan｜New number or mobile number porting?
No long-term contract is required. Service is available in periods of at least 30 days. Foreign customers can apply with a Residence Card or passport. If you do not top up for the next period, service is suspended and the number is later terminated under the carrier policy. Identity-verification availability can vary by registration details and the service used.
English guide
When getting a prepaid SIM in Korea, first decide whether you need a new phone number or want to keep your current number through mobile number porting (MNP). The checks required for each option are different.
Quick comparison
| Item | New activation | Number porting |
|---|---|---|
| Phone number | A new number is issued | Your current number is retained |
| Best for | People without a number or needing an additional number | People who want to keep their current number |
| Checks required | Identity and carrier registration restrictions | Current line status, matching account holder and porting eligibility |
When you need a new number
- You need a number in your own name but cannot open a postpaid line
- You need a number for verification messages or incoming calls
- You need a separate number for work or business
- You are a foreign visitor or resident who wants a Korean number without a long contract
- You only need a number for a short period
Foreign nationals may apply with an Alien Registration Card or original passport. Final eligibility is determined after checking the document, entry or stay information and carrier restrictions.
When you want to keep your number
Mobile number porting lets you keep your current phone number while changing the network or service. The current line must be checked for active status, matching ownership and porting restrictions. If keeping the number is essential, tell the store your current carrier and line status first.
Common prepaid options
For verification and receiving calls
- Monthly base fee: KT·LG U+ KRW 4,950 / SKT KRW 5,500
- Minimum first top-up: KRW 30,000
- Calls, messages and mobile data are deducted according to actual use
- Using Wi-Fi does not consume mobile data balance
KRW 36,000~36,300
Calls and messages are generally included. After 300MB of high-speed data, service continues at up to 3Mbps. YouTube can be watched at a lower video quality.
KRW 39,000
15GB of high-speed data followed by up to 3Mbps, with 100 call minutes and 100 text messages.
KRW 66,000
100GB of high-speed data followed by up to 5Mbps for people who use mobile data frequently.
Plan names and detailed conditions vary by Mobing, FreeT, Toss and the selected SKT, KT or LG U+ network. The store can compare all plans currently available.
What to bring
- Korean nationals: resident ID card or driver licence
- Foreign nationals: Alien Registration Card or original passport
- The phone in which the SIM will be used
If you do not have a phone, you can also check the used phones available at the store.
No long-term contract
Prepaid fixed plans can be used in minimum 30-day periods. Top up only for the period you need and stop topping up when the number is no longer required.
Saessak Mobile · Seomyeon, Busan
- Address: 28, Saessak-ro, Busanjin-gu, Busan
- Phone: 010-6386-9959
- Open: Monday–Saturday 10:00–20:00
- Closed on Sunday
Bring your identification and the phone you intend to use. We will first check whether you need a new number or want to keep your current number, then compare suitable plans.
※ Final activation eligibility depends on identity verification and the carrier restriction check.