How to get the mobile number of current sim card in real device and how to read meassage from mobile . I just want to read sim card number and messages of mobile. Can you please let me know how to resolve it.
Mobile devices don't provide that information for security/privacy reasons. You can access it in some low level Android API's but since this isn't portable we don't expose that.
Notice that apps like whatsapp, uber, gettaxi etc. all ask you to type in your phone number then a verification code sent via an SMS. That's exactly what JAT (which was built with Codename One) does.
来源：https://stackoverflow.com/questions/38933059/codenameonehow-to-get-the-mobile-number-of-current-sim-card-in-real-device