https://fixyourandroid.com/fix/why-does-my-phone-say-no-sim-adroid-iphone/
Why Does My Phone Say NO SIM? Well, there might be several reasons that make your phone go paranoid and show the no SIM card inserted message. It can be either deactivation of SIM, damaged, SIM card might not be inserted properly or plenty other. Find all the possible reasons for a "no SIM" error message and how to fix the error.
 

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