Korea's Big Three Carriers Must Text You a Cheaper Plan Every Six Months -- How to Read the Optimal-Plan Notice When It Arrives

What changed: recommending a plan becomes a duty for the carriers

The basis is an amendment to the Telecommunications Business Act passed by the National Assembly in March this year. It requires designated operators to analyze a subscriber's charges, terms of use and usage behavior and to tell them about the plan that suits them best, and the enforcement decree and notice setting out the details were put out for public comment in June. Until now, many people kept paying for a pricier plan unless they looked into it themselves; now the carrier has to speak first. The start date, however, differs slightly between reports. Some say October 1, while others say mid- or late October once a regulatory review ends, so the safest step is to check the Ministry of Science and ICT's announcement for the exact date.

Who is covered: subscribers of the big three, not budget carriers yet

The covered operators are those whose mobile revenue last year was at least 1 trillion won: SK Telecom, KT and LG Uplus. Budget (MVNO) carriers are excluded, and reports said an extension would be considered once the system settles. If you are on a budget carrier, you should assume this notice will not reach you. The benefit being added to budget plans is covered separately in how to check the MVNO data safety option.

How the recommendation is made: the last six months of usage

The carrier analyzes the subscriber's voice, text and data usage over the most recent six months. Reports on the draft notice say that counting from the first day of the month after the contract date, a notice must go out within one month of each six-month mark. That is why the month the text arrives differs from person to person. The recommendation puts first a product that is cheaper than the current one while still covering your usage, and if there is no suitable lower plan, your current plan can be shown as the best fit. In other words, the system is not designed to push a more expensive plan.

What the text or email contains

The notice is to include the monthly fee and terms of the current and recommended plans, recent usage, and the change in expected charges, early-termination penalty, and bundle or family discounts if you switch. Reports say the delivery method, such as text or email, is chosen by the subscriber, and that no separate application is needed if you are covered. Check with your carrier's app or customer center how you will receive it.

If you receive one, read it in this order

Switching on the monthly fee of the recommended plan alone can cost you. The order is as follows.

• 1. The amount saved: Look at the monthly difference between the current and recommended plans, then multiply it by 12 months.
• 2. The penalty: The notice includes the penalty change, so set it beside the savings. If a term-based discount is still running, the calculation differs; see how the 25% selected-term discount works and when it ends as well.
• 3. Bundle and family discounts: If you are tied to an internet bundle or a family bundle, the discount tier can change when you lower your plan. Check whether the notice gives the amount of that change.
• 4. Add-on services: See whether the streaming or membership benefits included in your current plan are kept in the recommended one.

A six-month average may differ from your normal usage

Because the analysis period is six months, critics point out that temporary changes such as school holidays, vacations, business trips or watching sports broadcasts can be weighted heavily. Conversely, if you used little data only in the last few months, a plan lower than you normally need could be recommended. To judge whether the recommendation is right, open your monthly data usage in the carrier's app and check whether the plan would cover the month you used the most. There were also comments that the system cannot weigh bundled benefits such as streaming or AI subscriptions.

The limit: it compares only within one carrier

This notice recommends only within each carrier's own products. To compare plans across all operators, including budget carriers, reports said you can use the Smart Choice (smartchoice.or.kr) portal run by the Korea Telecommunications Operators Association. When a contract ends, the plan discount often ends with it, so re-applying for the 25% selected-term discount is something to handle separately. The notice is only a starting point for comparison; decide whether to switch after working through the order above.

Summary of steps and where to ask

When the text arrives, first line up the monthly fee difference, the penalty and the change in bundle or family discounts, then check the month of heaviest usage and decide whether switching is safe. If the explanation does not match reality, or the post-switch bill differs from the notice, raise it first with your carrier's customer center, and if it is not resolved you can move on to the telecom dispute mediation procedure. This post is general information compiled from press reports; the start date and delivery method may change, and it does not replace a judgment about your own plan. Please confirm the final details in announcements from the Ministry of Science and ICT and your carrier.