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I am currently developing an Android anti-theft application and I am new in Android development. My apps is able to remotely lock the lost phone, so during configuration, user needs to enter a valid phone number, but how I determine whether the phone number entered is valid? Thanks
-Option one : read(get) the phone number from the sim card (if available, not all operators enable this)
-Option two : If sim card changed(sim serial number) lock the phone and send sms to an other phone number (since the thief will throw away the sim card )
-Option three : use what WHatApp android application uses to identify a person (sending an sms to a specified phone number and detect the incoming sms)
Option 3 seems a bit complicated since you will need a sever side with an sms gateway.
Well here’s what comes to my mind .Good luck.