New cell phone - how to transfer data and which SIM card provider?

I will soon get a new cell phone, a Samsung A52 5G, and would like to transfer my data from my old cell phone (a Huawei Nova 3i) to it. Do you have any tips for that? Should I do it with an app, if so with which one, if not with what then? I also need a new SIM card, which provider would you recommend? LG and thank you!

Would recommend a contract with Telekom or Congstar, especially with 5G, Telekom is good (but of course also with 4G). Congstar is also from Telekom, but doesn't have 5G there.

You may be able to transfer the data with Google Drive, depending on how many you have.

The Smartswitch app is already on the Samsung mobile phone, with which you can transfer the data from your old mobile phone. The commissioning menu leads you to this point automatically.

Have you ever looked at our tariffs or prepaid offers? Maybe there's something for you.

I'm also happy to help. What is important to you?

Regards, Kai M.