Korea's MVNO QoS Plans Arrive in August: What 400Kbps Actually Buys

From August, Korean budget mobile plans (alddeulpon, the country's MVNO tier) will keep users connected at 400Kbps after their monthly data allowance is exhausted — the carriers' "data relief option," or QoS. Not every plan qualifies. According to ZDNet Korea, the Ministry of Science and ICT will apply QoS at no extra charge to 91 existing wholesale plans, and will cut wholesale rates on 17 5G plans by 1 to 3 percentage points from August.

Judging by the published material, the substance here is not a price cut but a change of state: the connection no longer dies. Whether that matters depends on what 400Kbps can carry, and on whether your plan is among those 91.

What changes in August

The Korean government policy briefing lays out the "MVNO 2.0" package in four parts. The three network operators will wholesale their data relief option to budget carriers. Radio spectrum fee discounts for small and mid-sized MVNOs rise from 50% to 90%. Customer service standards, including call centre staffing ratios, are raised. And groundwork is laid for full MVNOs that manage their own traffic.

The government estimates the combination saves the industry roughly 25 billion won a year.

The rollout is staged. Electronic Times reports that QoS reaches its first plans in late August, centred on revenue-share (RS) plans designed by the network operators. The same report says the three operators intend to withhold QoS from plans the MVNOs design themselves (RM), and that wholesaling a 1Mbps QoS tier on a metered basis carries roughly 7,700 won in additional cost.

How much does 400Kbps carry in an hour

Convert the speed into volume. 400Kbps is 400 kilobits per second, or 50KB per second in bytes. Over an hour that is 50KB × 3,600 = 180,000KB, or 180MB. Hold the connection for six hours a day and it totals 1.08GB. The volume is not small. The constraint is instantaneous speed, not the monthly sum.

Volumes use the telecom convention of 1MB = 1,000KB. The usability column reflects reporting by EBN, which noted that 400Kbps handles messaging and basic search but falls short of high-definition video; comfortable video viewing generally requires the 3Mbps tier or above.

The same report notes the tiers differ by operator. KT and SK Telecom split QoS into four levels — 400Kbps, 1Mbps, 5Mbps and unlimited — while LG U+ inserts a 3Mbps step for five. What opens to budget carriers first is the lowest of these.

Staying connected and being able to use the connection are different states. 400Kbps guarantees the first and not the second.

Is your plan eligible — RS versus RM

Budget plans come in two families. RS plans are designed by the network operator and resold with revenue shared back; RM plans are assembled by the budget carrier from wholesale data and voice. The headline ultra-cheap plans are usually RM.

QoS opens on the RS side first. On the operators' stated position, RM plans will not carry it for now. Three things to check on a price sheet: whether there is a throttled-speed clause after the allowance runs out, what figure in Kbps it names, and whether the terms apply permanently or only during a promotion.

The mainstream side matters too. EBN reports the three operators consolidated their line-ups with integrated LTE/5G plans — SK Telecom from 67 to 16, KT from 105 to 18, LG U+ from 53 to 18 — with QoS included from the 20,000-won tier upward. The government estimates about 7.17 million beneficiaries and 322.1 billion won in annual savings. That is precisely where the budget carriers' price advantage narrows.

Electronic Times reports that MVNOs saw a net loss of 7,353 number-portability subscribers in April, the first decline this year — the backdrop to the industry's push for wholesale QoS. If a switch is on the table, sorting out the activation and issuance-fee differences between eSIM and a physical SIM first keeps the comparison simple.

How far the savings reach one subscriber

The 25 billion won figure covers the whole industry. Against the more than 10 million budget subscribers cited in the policy briefing, that is 2,500 won per person per year, or about 208 won a month. Applying the 1–3 percentage point wholesale cut to a 20,000-won plan yields 200 to 600 won of cost relief per month.

The last row compresses the limitation. 400Kbps rides along free, but buying the 1Mbps tier that video actually needs costs 7,700 won at wholesale alone — close to a 38% increase on a 20,000-won plan before any retail margin. That is why the practical choice for budget carriers narrows to a single speed.

Who this fits, and who should wait

It fits anyone who stays inside their allowance most of the month and only needs messaging, maps and light search to keep working near month end. For that pattern, 400Kbps is adequate on the published assessments and costs nothing extra. The gain is largest for those on small allowances who have been buying data top-ups every month.

Three groups should wait. If you are on an RM-family ultra-cheap plan, there is no assurance QoS arrives. If you need video after the allowance runs out, 400Kbps will not deliver it and the question is whether a 3Mbps tier ever opens. And if the gap between your plan and a 20,000-won integrated plan from a major carrier has narrowed to a few thousand won, comparing after the actual eligible plan list appears in late August costs less than switching now.

• Check the price sheet for a post-allowance throttling clause and its Kbps figure
• Establish whether your plan is operator-designed (RS) or carrier-assembled (RM)
• Confirm whether QoS is permanent or promotional
• Compare your average monthly data top-up spend against a 20,000-won integrated plan

Sources

• ZDNet Korea — MVNOs to launch QoS plans from August
• Korea policy briefing — data relief option comes to budget carriers
• Electronic Times — first QoS on budget plans next month, wholesale talks begin
• EBN — questions over 400Kbps in the era of 20,000-won unlimited plans