async on Nostr: Wipe data/factory phone (via recovery mode) Install F-droid if you want to avoid ...

Wipe data/factory phone (via recovery mode)

Install F-droid if you want to avoid setting up google drive

Download/Install wallet software
Put airplane mode and remove saved wifi password
Create crypto wallet
Backup seed wallet
From now on you MUST avoid connecting it to the internet (if you do, your security may be compromised)

I can’t advice specific apps, here are some:

https://search.f-droid.org/?q=wallet&lang=en