If your Android phone is showing a “No SIM Card Detected” error, you can’t connect to your cellular network. When that happens, you can’t use your phone to make or receive calls, send texts, or ...
If you've just got your hands on a shiny new Sim card, congratulations. Switching your Sim (the chip that dictates your allowance) can unlock huge savings. Now comes the crucial step of activating it ...
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