Korea’s 2026 Phone Plan Overhaul: What Changes for Foreigners

Korea is rebuilding its mobile plans this year. The three carriers (SK Telecom, KT, and LG U+) are scrapping the old split between 5G and LTE plans, and under a government rule every new plan now slows your data down when you hit your cap instead of cutting you off. LG U+ switched on June 1, KT follows on July 1, and SKT on July 2. For foreigners living here, the changes mostly help, but the cheapest options and the day-one barriers are not quite what the headlines suggest.

One plan menu instead of two

Choosing a Korean plan used to mean first deciding between 5G and LTE, then picking a data tier inside that. The new “integrated” plans drop the first step. You pick a data amount, and it runs on whichever network your phone supports. The 5G-versus-LTE label is effectively gone.

The bigger shift is what happens when your data runs out. The Ministry of Science and ICT required every plan to keep a minimum connection alive after your allowance is spent, a “data safety” rule the carriers deliver as QoS throttling (최소 인터넷 접속 보장). On KT’s new plans the throttled speed runs from about 5 Mbps on the larger tiers down to 400 Kbps on the cheapest, while the top “unlimited” tier is not throttled at all. In plain terms: the Naver Map you opened to find your new apartment keeps loading on the last day of the month, instead of dying when you need it most.

How the three carriers compare

All three slashed their menus and pushed an entry price into the ₩20,000s. The detail differs:

SKT cut deepest at the low end, where its sub-₩28,000 plan never fully disconnects you thanks to the new throttling floor (머니투데이). KT’s “Choice” line is the one to check if you truly want no slowdown. LG U+, first to move, set the tone with its ₩28,000 unlimited tier. None of this is a giveaway; the carriers are trading a simpler menu and a safety floor for plans that mostly sit where the old mid-tier plans did.

Where this leaves prepaid and budget plans (where most foreigners start)

The headlines skip this part. Most foreigners never begin on a carrier postpaid plan, because those need an Alien Registration Card (ARC) and a Korean bank or credit card that you do not have in your first weeks. You begin on prepaid, or on a budget 알뜰폰 (MVNO) plan, which need only a passport.

Those plans are not automatically part of this overhaul. MVNOs rent capacity from the three carriers and price off the wholesale rate, so they move on a slower clock. The segment is big and crowded: it passed 10 million subscribers in early 2026, roughly 18–19% of the market, and a typical 100GB budget plan has hovered near ₩21,000 a month on promotional pricing. That still undercuts the carriers’ new ₩27,000–29,000 entry plans, but the gap is shrinking, which is why trade press is calling this the point where “real competition” for 알뜰폰 begins. For a newcomer the practical sequence has not changed: start on a flexible prepaid or eSIM plan, then move to a carrier postpaid plan once your ARC opens the better unlimited tiers.

What changes for your Kimchi Mobile plan

Kimchi Mobile runs on the KT network, so KT’s July 1 reset reaches our plans too. From that date KT stops selling its old 5G and LTE plans to new customers and moves to the integrated “Choice” and “Basic” line-up. Our 60-day, 60GB prepaid starter behaves exactly as before; what updates is the 12-month postpaid tier you switch into after your ARC arrives, which now maps onto KT’s new plans and their slow-don’t-stop data. Current tiers and prices live on the Welcome SIM page, which we refresh as KT’s plans go live.

Where to confirm the details yourself

Plan specifics often shift between announcement and launch, so check the source before you commit. KT published its change in an official notice, and the policy behind it, including the data-safety rule, came from the Ministry of Science and ICT. For live prices, the carriers’ own sites (KT, SKT T world, LG U+) list the final tiers, and Korean comparison sites such as 모요 line up MVNO options side by side.

Quick questions

Does this change my existing plan, or only new sign-ups? You are not forced off your current plan on the switch dates. The carriers are closing the old plans to new subscribers and steering new customers to the integrated line-up, so the new unlimited behaviour only arrives if you move to a new plan.

Will prepaid and 알뜰폰 prices fall to match? Not right away. Those plans ride wholesale rates that move on their own schedule, so expect the gap with carrier plans to narrow over months rather than overnight.

Can I get any of this without an ARC? Not the carrier postpaid plans. Until your ARC arrives, a prepaid SIM or a data-only eSIM (passport only) is the realistic route, and you switch afterward.

For most foreigners this reform is a quiet win: fewer choices to decode, and a phone that slows rather than stops. The day-one hurdle has not moved, so a flexible prepaid or eSIM start still makes the most sense, with a switch to postpaid once you are settled.