Do I need to buy a new USIM when I change my phone?

pu1. No, as long as it's the right type. Just check if it's a USIM or a USIM or a Nano USIM

2017-12-17

OK

pu2. Even if the type of USIM is different, the latest phone usually uses a small USIM, so you can cut it and use it. You can find out how to cut the USIM on the internet

2017-12-17

OK