IMEI prefix 35778604

BlackBerry 2007

ModelCurve

BrandBlackBerry

ReleasedReleased 2007, May

OSBlackBerry OS

Display2.5" · 320x240 pixels

The eight digits 35778604 identify a BlackBerry Curve. A phone whose IMEI starts with them is that model, whatever the seller wrote in the listing — the TAC is the manufacturer’s own allocation, not a lookup table someone typed by hand.

Have the full IMEI? The free TAC / IMEI lookup resolves it and returns the specification sheet. For the lock state, use the $0.03 SIM lock check — a model lookup cannot tell you whether the handset is carrier locked.

What a TAC cannot tell you

Three things decide whether a device is worth buying, and none of them is in the TAC: whether it is carrier locked, whether it is blacklisted, and whether iCloud or MDM is on. Those are separate records against the full IMEI, and each costs a few cents to read.

Carrier lock — the operator that owns the activation policy, from $0.03.
Blacklist — GSMA and carrier registers, from $0.03.
iCloud / MDM — the locks no unlock service can remove.

Same model, other prefixes

TAC from the GSMA allocation register, last updated 2026-10-28.