Carrier trade-in vs second-hand shop — which pays better in 2026?

Short answer: Want cash to use freely? Selling to a buyback shop wins. Want a new-phone discount finished in one place? Carrier trade-in is more convenient. There is no single best answer — check these 4 points first.

1. Second-hand prices fall in cycles — wrong timing costs thousands

The Thai market picture in 2026 is consistent across research:

• Year one loses 3–5% per month on average, steepest in the first 6 months
• In September (Apple launches) older models drop 10–20% immediately
• Prices are calmest April–June; August–September is the window to avoid if you can

If your upgrade cycle lines up, check prices before September — after launch the whole board reprices down.

2. How far apart are grade A and B?

Big centers grade the same way:

• Grade A: 100% working, no more than 3 light marks, no heavy screen/body damage
• Grade B: 100% working too, but medium marks or more than 3 spots

The A/B gap runs about 1,000–2,000 THB depending on model and capacity. Inspect the phone in good light, then grade honestly in a quote for the closest number.

Grades look at exterior marks — battery is scored separately

3. Carrier trade-in: convenient and safe, but pays as discount

Studio 7, iStudio, AIS and True share a skeleton with very different terms:

• The appraised value becomes a new-phone discount, never cash (all of them)
• On-top promos / trade bonuses come and go (research found roughly 1,000–8,000 THB by campaign)
• Combinable with 0% installments at many stores
• Studio 7: clear per-model A/B price tables, beats iStudio in 85 of 90 compared models (Sept 2026 data) — but the official site requires trading the same day you buy (some campaigns allow a 5-day return — always check that round's terms)
• iStudio: priced below nearly everything (wins only 16e/17e) and appraises through outside company CompAsia (SPVi disclaims the transaction) — but takes up to 5 devices and locks prices 21 days
• True: Value Care guarantees 65% trade-back for iPhone 18 buyers on 1,499+ plans (12-month contract, usable through end of 2027)

Best for people already buying new who hate hassle — but if you want cash for something else, no trade-in program pays it.

4. Selling to a buyback shop: lump sum now, but pick the shop well

• Cash or instant transfer after agreeing — spend it on anything
• Direct buyback prices follow the mid-market, not tied to new-phone promos
• Doorstep pickup and postal service for upcountry sellers (pack well, send Kerry/Flash/J&T, wait for inspection and transfer)
• Watch out: mall kiosks have no standards and can lowball on the spot, while selling it yourself may fetch more but risks scammers and chat time

5. Four things that drag the price down on any channel

1. Battery below 85% — a four-figure deduction is normal. How to check takes 10 seconds.
2. Missing box / incomplete accessories — a matching-IMEI box adds trust.
3. Foreign sets — Thai-code (TH/A) devices resell easier with local service access.
4. iCloud-locked / heavily repaired / third-party parts — downgraded or rejected outright. Erase properly first.

Long remaining warranty and big capacity hold value up, because shops resell them faster.

Ready? Check your device in 30 seconds — just model and condition, see your range before deciding.

Preliminary estimate — final price depends on actual condition.

Sources