Samsung IMEI Check
Verify any Galaxy phone's IMEI against the GSMA blacklist and US carrier blocks. Galaxy phones have an extra layer of complexity vs iPhone — Knox warranty bit, Reactivation Lock — but the IMEI check is still the first step.
Galaxy-specific IMEI gotchas
Dual SIM means two IMEIs
Galaxy S22+ and most Note / Z Fold / Z Flip models support dual SIM. Dial *#06# and the screen shows two IMEIs. Both must come back clean from the blacklist check — either one being flagged blocks the entire device.
Knox warranty bit — separate from IMEI
After the IMEI check, also verify the Knox bit:
- Settings → About phone → Status information.
- "Knox warranty void" should read 0x0 (not tripped) or 0x1 (tripped).
A 0x1 means the device was rooted, had its bootloader unlocked, or ran a custom firmware at some point. Knox-tripped devices can't run Samsung Pay, Secure Folder, or Samsung Health. Resale value drops a tier, sometimes more. The bit is one-way — once tripped, you can't reset it.
Carrier-locked Galaxy phones
Verizon, AT&T, and T-Mobile all sell carrier-locked Galaxy phones. The lock can be device-payment-plan-driven (most common) or contract-discount-driven. Verify with Settings → About phone → Status → SIM lock or by attempting to insert a different carrier's SIM. Carrier-locked Galaxies sell for 10–15% less than unlocked, with T-Mobile carrier locks being the slowest to clear post-payoff.
FRP and Samsung Reactivation Lock — both can apply
Galaxy phones can have both Google FRP and Samsung Reactivation Lock active. Both must be cleared before resale. The IMEI check doesn't show either — verify them separately by confirming no Google or Samsung account is signed in (Settings → Accounts).
Verification checklist for incoming Galaxy phones
- Run the IMEI blacklist check above. Both IMEIs (if dual SIM) must be clean.
- Settings → About phone → Status → Knox warranty void → confirm 0x0.
- Settings → Accounts → confirm no Samsung account or Google account signed in.
- Settings → Lock screen and security → Find My Mobile → confirm off.
- Test SIM lock by attempting to insert a different carrier's SIM (or check Settings → SIM lock).
Why Galaxy IMEI checks matter especially for B2B sourcing
B2B wholesale Galaxy phones often come from carrier returns. These pallets have a higher rate of tripped Knox bits and unpaid DPP locks than equivalent iPhone pallets — partly because Android rooting was more common in the device's first life. Always run the full Knox + IMEI + account check on every Galaxy unit before payment.