Keep your U+ u mobile number active while abroad

U+유모바일 is an MVNO selling on the LG U+ network, and its help center is the one Korean source we could read end to end. The carrier it resells is not the carrier whose article this is, and nothing here is claimed for SK Telecom, KT or LG U+ itself.

Suspension is the product

The article we could read describes a state in which the subscription continues and the service stops, not a separate retention fee. The same article gives the limit first: "일시정지는 1년에 2회, 총 180일 한도 내에서 이용 가능합니다."

Twice a year, and 180 days in total. For a subscriber planning a year abroad that cap is the whole story, because the arrangement runs out before the absence does, and the same article describes nothing that takes over afterwards.

What it costs

A suspended line is not free, and the price is on the same article: "기본요금 월 4,400원 (부가세 포함) 이 청구되며, 정지/해제 당월은 일할 계산됩니다."

4,400 won a month including VAT, charged pro rata in the month the suspension begins or ends. Compare that with the other hold arrangements on this site: China's 停机保号 is priced per month by province, Nigeria's line parking states no fee in the rules we read, and India's protection costs nothing because it happens by regulation rather than by request. Among those four, this is the one that prints an annual cap next to the price.

The first thirty days still ring

The suspension is not silent from the first minute, and the article states the exception in the same list as the fee: "최초 30일은 받는 통화와 음성사서함 서비스만 이용 가능합니다."

Incoming calls and voicemail for the first month. That is the receive window the page describes, and it is much shorter than the one at Smart in the Philippines, where incoming calls and text messages keep arriving for the whole 180-day no-load period. A Korean number suspended to save money is a number that can still be called for thirty days and then cannot.

The request does not need you in the country

This is the line worth keeping in a note, because no other carrier we have read publishes it: "명의자 본인이 해외에 계실 경우, 한국에 계신 가족/지인분께서 고객센터로 전화 주시면 상담을 통해 처리가 가능합니다."

If the account holder is abroad, a family member or acquaintance in Korea can call the customer center and the suspension is handled through that call. The requirement is a person in Korea rather than the account holder's presence, which is the practical answer for anyone who has already left.

What cannot be done from abroad

Two doors close once you are outside the country. On activation, the help center states that "온라인을 통한 유심 개통 신청은 국내에서만 가능하며 해외에서는 신청이 불가합니다", and advises completing the activation application before departure. Asked whether an eSIM already in use can be changed, a second article lists a block for an applicant whose residence or stay is abroad, and marks that case as possible "국내에서만".

Read together with the suspension rules, they describe an order of operations: the line has to be activated in Korea, the suspension has to be requested by someone in Korea, and the suspension itself is the one step that works with the account holder elsewhere.

What the article does not settle

Whether a code reaches a suspended SIM, and whether it reaches an active one abroad, are roaming questions this article does not address. And the annual cap is published by this MVNO; whether SK Telecom, KT and LG U+ set the same one is a question their own terms would answer, and those documents did not survive extraction for us, as the South Korea page records.

Before you fly

• Activate and set up the line while you are in Korea, since neither activation nor an eSIM change can be done from abroad.
• Give the person who will call the customer center your account details before you leave.
• Note that a suspension is capped at 180 days a year, so a longer absence needs a different plan.
• Treat day thirty as the end of the ringing window, not day one hundred and eighty.