Setup a Google-Free mobile phone
find out if there is TWRP for device code: https://twrp.me/Devices/
find out if there is a custom rom for device code: https://download.lineage.microg.org/
Liberating your device from google voids the warranty.
If it fails and your backup does not work correctly, you risk that contacts or data are not available anymore.
If you have to use unofficial LineageOS or TWRP builds, because the device is not supported, the installation can fail. Then you'll have to flash the stock rom, and restore the backup. It's a nasty effort.
If you have to flash the stock rom, you can only login and use the phone, when you log into a Google account, that already was logged into the phone before you flashed it. Be wary if you bought the phone second hand/online.
Step By Step
Back up data before flashing
- install F-Droid
- install DAVDroid
- create ownCloud account
- backup telegram accounts
- backup files to ownCloud
- sync Contacts to ownCloud
install TWRP https://www.xda-developers.com/how-to-install-twrp/
install lineageOS with microG https://lineage.microg.org/#instructions
- if not possible, install normal lineageOS and enable signature spoofing
- Encrypt phone
Install F-Droid from their website: https://f-droid.org/
- Install cryptfs
- if necessary, root the device with magisk
- wrong pin shutdown
On F-Droid, you can get open source apps for almost any purpose. If you need Google Play Store apps, you can install them via the Aurora store. You can install the Aurora Store on F-Droid, too.
DAVdroid: sync Contacts & Calendar with ownCloud
- Firefox Klar: private browser
Maps: offline maps with https://openstreetmap.org
- Offi Stations: public transport connections. Different networks are available
- Briar: End-to-End encrypted serverless Messenger
- Conversations: End-to-End encrypted XMPP Messenger
DeltaChat: End-to-End encrypted E-Mail Messenger
ownCloud: store your data in a private cloud. Ask firstname.lastname@example.org for an account
And if you really want proprietary shit software on your device:
setup Whatsapp with island https://forum.xda-developers.com/android/apps-games/closed-beta-test-incoming-companion-app-t3366295
- install FB messenger with island
install Netflix or Amazon Video with Aurora https://www.reddit.com/r/LineageOS/comments/7c4b3i/netflix_and_losextrasaddonsu/