Copy from/to phone <->SIM

[bitsnaps]

Checklist

• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• This issue contains only one feature request.
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Feature description

Copy contact(s) from phone to/from SIM.
This feature is supported in some old apps ( [DumbphoneAssistant](https://github.com/yeriomin/DumbphoneAssistant, Copy2SIM) which are still -somehow- working on Android 13.
P.S. I'm not sure which SIM slot refers the USIM in the menu, because when selecting USIM it just reads the SIM1 (the Copy2SIM app is able to switch between SIM1 and SIM2).

Why do you want this feature?

This feature is important to copy contacts into a new brand sim.

Additional information

No response

[erenpal]

Any update?

[naveensingh]

This is doable, but exporting may not work reliably on all devices.

[abeorch]

Copying/ moving between accounts &/or sims would be useful. Especially when using Davx5 to sync contacts from nextcloud and other cardDav accounts alongside A google account.

[benjuade]

+1 on this, copying a small number of important contacts to SIM is a safe backup procedure