Flashback: some crazy phones had three or even four SIM card slots - GSMArena.com news - GSMArena.com

How many is too many? Dual-SIM phones have their uses and the first arrived in 2000. But things got out of control for a period after that.

How many SIM slots does your phone have? In some regions dual-SIM models are quite popular, though in recent years eSIM (embedded SIM) has started taking over from the secondary slot for an external … [+4340 chars]

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