Why Do Some Phones Not Have Sim Cards? [Solved]

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Why Do Some Phones Not Have Sim Cards? [Solved]

Phones are tracked by their ESN (electronic serial number) so they don’t need SIM cards. Once activated, a CDMA phone is tied directly to that particular carrier’s network. In the United States, most mobile carriers provide CDMA phones. The two main exceptions are AT&T and T-Mobile, which both provide GSM phones.26 Apr 2019

Using Phones with No-SIM Cards and Other Privacy Experiments

We will test out various technologies that allow us to communicate on the

iphone says no sim card installed when there is one

iphone says no

iPhones: SIM Card Not Working? No Service, No SIM Card, Invalid SIM, Stuck on Searching? FIXED!

I give you several easy possible fixes on how to an iPhone that