Samsung Galaxy A21S

AT&T from $0.07

Unlock services

9 services listed

Prices are live per order. Check the lock state first — a wrong tier is refunded, a reported IMEI is not.

CarrierAT&T

ReleasedReleased 2020, June 02

ChipsetExynos 850

Price range$0.07 – $145

A Samsung Galaxy A21S that was sold through AT&T carries that operator’s activation policy. The official rules are summarised in the AT&T unlock guide. This page shows the services we hold for AT&T against this model, with the price of each.

Check first. Run the $0.03 carrier and SIM lock check before ordering: if the device is already unlocked, or locked to a different operator, every tier below is the wrong purchase. Reported IMEIs cannot be unlocked into service at all.

The register dates this model to 2020; AT&T pricing depends on the generation, so the tiers below are ordered by price rather than by name.

AT&T unlock services for the Samsung Galaxy A21S

Service	Price	Type
US AT&T Unlockl Check Pro -「Charge No Matter Unlocked or Not」	$0.07	carrier unlock
US AT&T Active on other account Unlock - iPhone & Generic	$1.60	carrier unlock
US AT&T Active \| 60 days Unlock - iPhone & Generic	$1.60	carrier unlock
US AT&T no longer active Unlock - iPhone & Generic	$4	carrier unlock
Mexico AT&T \| Lusacell \| Unefone \| Nextel Unlock Code NCK 99% Success - Samsung, Motorola & Generic	$4.50	carrier unlock
US AT&T Past Due Unlock 50% Success - iPhone 4-17 series & Generic	$40	carrier unlock
US AT&T Device APP Unlock - Samsung, Google Pixel	$60	carrier unlock
US AT&T Past due 100% Unlock -Samsung S24 Series & iPhone 15 Series	$104	carrier unlock
US AT&T Past due Unlock 100% Success - iPhone 17 Series & Generic	$145	carrier unlock

Prices are live and per order; a refused request is refunded.

Range for this combination: $0.07 – $145.

TACs that identify this model

What to do, in order

Confirm the model from the IMEI — the free TAC lookup resolves the first eight digits.
Confirm the carrier: a phone sold as one brand is often on a sister brand’s record.
Check the blacklist if you are buying the device rather than unlocking your own.
Order the tier that matches the reported state, or ask the carrier for the free unlock if you are the account holder and the device qualifies.

Other carriers for this model

Samsung Galaxy A21Sall unlock tiers

Last updated 2026-10-28. Carrier rules change; the operator’s own page wins.