Inform your telephone operator. You will have to provide the IMEI of your terminal.
There are several different ways to find out the IMEI of your smartphone:
- Open the "Calls" app and type *#06#.
- Check it on the back of your smartphone or in the SIM card slot,
- Look for it on the sticker on the phone's box.
For Dual SIM models, the code of the second SIM card "S-IMEI"