@Sapleusseiy11
thanks for the contribution
>... change the PIN number for my SIM card?...
for change PIN code need to know the PUK code
1. Check PUK code in the Customer Area
My Swisscom > On the move... mobile > Devices & SIM
PUK information / PUK: •••••••• > Show PUK
If the PIN has been entered incorrectly several times, unlock SIM with PUK.
2. Insert SIM card in the mobile phone before entering the PUK code.
3. Then choose a new PIN code that has never been used on the device.
4. If it is still not possible to register a new PIN, go to a Swisscom Shop
for more informations
Unlock your device or SIM – Help | Swisscom
On this page: Have you forgotten your PIN or device code or entered it incorrectly too many times? Find help on unlocking your SIM or smartphone.