How do I safely switch all my data from Nokia 520 to 920?

[Windows Central Question]

Switching to Nokia 920 from 520 (which is already running 8.1). I need to upgrade 920 to WIN 8.1.

When do I put my ATT SIM card in, before or after I upgrade?

When I remove SIM card from 520 can I put it back in without losing any thing?

Thanks.

 

[Maurizio Troso]

Switching to Nokia 920 from 520 (which is already running 8.1). I need to upgrade 920 to WIN 8.1.

When do I put my ATT SIM card in, before or after I upgrade?

When I remove SIM card from 520 can I put it back in without losing any thing?

Thanks.

1 - leave sim on 520. You'll need it for getting security check code from Microsoft during 920 update
2 - all your personal data (numbers, messages, etc) are stored in OneDrive, not in your sim. They will be downloaded via wifi in your new phone after logged in with your MS account
3 - after your 920 completed update, move your sim from older to newer phone.

PS: your 920 could get Windows 10 as all other lumias, check it out:

http://forums.windowscentral.com/wi...-redstone-unsupported-devices-x2x-series.html