Korean Phone Plan for Foreigners: Postpaid, ARC & MVNO

A tourist SIM gets you data. A postpaid Korean phone plan in your own name gets you a life.

That sounds dramatic until you try to open a delivery app, book a KTX ticket on the Korean site or sign in to your bank, and every one of them sends a verification code to “your” phone number, then checks whose name that number is registered to. This article is about getting that number: the one tied to your residence card.

This is Part 3 of our Living in Seoul 101 series. If you are only visiting, you want our tourist SIM and eSIM guide and the eSIM vs SIM vs pocket Wi-Fi comparison instead.

Can foreigners get a postpaid phone plan in Korea?

Yes, once you have a residence card. Korea’s government guidance for international students, based on the national study-abroad guidebook, lays out the three options clearly:

📱 Prepaid, postpaid and MVNO for foreign residents

The honest reading of that table: prepaid is the bridge, not the destination. You buy it on arrival with your passport, use it while you wait the few weeks for your residence card (Part 1), then move to a postpaid or MVNO line in your own name.

KT, for example, sells a foreigner-only prepaid plan that accepts a passport or residence card, priced at ₩35,000, ₩45,000 or ₩55,000 per 30 days.

How much does a Korean phone plan cost in 2026?

Roughly: MVNO plans from under ₩10,000 to about ₩20,000 a month, big-three online plans from ₩27,000, and big-three in-store unlimited plans at ₩89,000 to ₩129,000 before discounts. The gap between the cheapest and priciest way to get the same network is enormous.

SK Telecom’s own plan list shows the spread. Its online-only direct 5G plans start at ₩27,000 a month for 6 GB, ₩34,000 for 11 GB, and ₩55,000 for 250 GB, with unlimited plans from ₩62,000 (₩62,000, ₩69,000 and ₩76,000). Direct plans have no contract, so there is no early-termination penalty. Online sign-up needs identity verification, so check that it accepts your residence card before you count on a direct plan. Its flagship in-store unlimited plans list at ₩89,000 to ₩129,000 before discounts.

💰 Sample monthly prices, 2026 (check current offers before signing)

The MVNO figures come from ThorKit’s May 2026 comparison of published plans, not from the carriers, and many MVNO prices are promotional for the first several months. Always check what the plan costs after the promotion ends.

What is the phone contract trap?

The trap is signing a 24-month device installment plus a high-priced plan in a store, without reading what you will owe if you leave early. Foreign residents on one- or two-year visas are exactly the people who leave early.

The rules changed in July 2025. Korea abolished the Mobile Device Distribution Act (the 단통법) on 22 July 2025. Stores can now offer unlimited extra subsidies on phones, and you can combine those subsidies with the 25% selective-contract discount on your monthly fee, which was not allowed before. That can mean genuinely cheaper phones. It also means more complicated offers.

The government’s own checklist for buyers after the change is a good one to follow:

The 선택약정 (selective contract) discount is the one to understand. You commit to a plan for 12 or 24 months and get 25% off the monthly fee instead of a device subsidy. On a ₩89,000 plan, that is ₩66,750 a month. Breaking the commitment early means repaying part of the discount.

Why does PASS verification matter so much?

Because in Korea, your phone number is your online ID. Sites confirm you are you by sending a code to a number registered in your name, usually through the carriers’ shared PASS app or a text-message check. A prepaid tourist SIM, or a line in a friend’s name, fails.

Once your postpaid or MVNO line is in your name and linked to your residence card number, a long list of things starts working: Korean banking apps, delivery apps, government sites, online shopping and ticketing. Our explainer on why nothing works in Korea without a phone number goes through the details, and our cashless payment guide covers the payment apps that depend on it.

An MVNO line is also registered in your name, so verification generally works there too. Confirm with the MVNO before signing if a specific app matters to you.

How do you switch from prepaid to postpaid?

You can usually keep your number. Ask for number portability (번호이동) when you sign the new plan, whether with a big-three store or an MVNO website.

Foreign-language help, as listed in the government guidance: SKT 080-011-6000 (ask for foreign-language service: English, Chinese, Japanese), KT 02-2190-1180 (dedicated foreigner team: English, Chinese, Japanese), LG U+ 1544-0010 (ask for English). KT’s product page also lists a foreigner centre at 080-448-0100.

What happens when your visa ends or you leave Korea?

Update your stay period with the carrier whenever you extend your visa. Carrier terms allow them to suspend a foreigner’s line when the legal stay expires, unless you show proof of the extension, or a receipt if the extension is still under review.

When you leave Korea for good, cancel the line (해지) before you go. Carrier terms, such as FreeT’s, say lines of foreigners confirmed to have left permanently are terminated, and any unpaid bills or installments can end up with a collection agency. Some carriers’ terms waive early-termination penalties for emigration or a long stay abroad if you provide documents, so ask.

Leave a Korean bank account open, or settle everything, before the final bill arrives.