[FYT Android Head Units] surfer63:
#26. Google Contacts sync? DON'T DO IT !!

When you flash your unit, you will most probably setup your Google account (Settings -> User -> Accounts). By default most of the synchronizing is switched on, including the Contacts sync.

Disable this as soon as possible!! Already since 2016 this is a bug in the FYT software. With sync on, the unit will delete all your contacts. (see video by John Molberg).

How to prevent this?

After setting up your google account, immediately disable Contacts sync.

When connecting your phone with your unit via Bluetooth, you can enable contact sync via BT.

Once your contacts have synced, I advice to alsodisable contact synv via BT. (Press the gear icon when connected and disable contact sync).

Note: After firmware flash always check your Google accounts contacts sync again. (The 20200407 erased my contacts again)

Tip: Export your contacts before firmware flash.

See this youtube video from John Molberg about the deletion.

#27. Improved Bluetooth Pairing (still far from perfect)

This is not a great solution. It is more a simple work-around.

Before flashing your firmware, you should update one line in the config.txt.

Set line "sys.fyt.bluetooth_type=1" to "sys.fyt.bluetooth_type=0". Now flash the firmware.

If you already flashed the firmware, you can do a "config.txt flash only" using my zip attached to this post.

See also #14.

#28. Order of Bluetooth pairing

Say you have an OBD2 dongle, it sometimes pairs immediately and it sometimes doesn't.

Disclaimer: Some will never pair. The Bluetooth ID-string need to contain OBD.

But:

your dongle is compatible, but it will still not pair.

your dongle is compatible but it will only pair using pincode 1234 (or whatever code).

First in the BT contect settings "forget" your paired phone(s). (Not only unpair but really remove them).

Now pair your OBD2 dongle. If necessary, first set the pincode in your unit to the pincode of your OBD2 dongle,

After having successfully paired your OBD2 dongle , you can now pair your phone(s) using the same pincode.

#29. Google Play Store does not start downloading.

This is a very annoying problem which I have regularly. It can be solved though.

Below options can be tried starting from the first. if it doesn't work, try the others one by one.

In the Play Store app, tap the "hamburger" menu (3-lines top-left) and select "My apps and games" (But probably you were already there). Remove all apps from the update-queue. Reboot.

Turn off auto-update for your apps.

Go to Settings->Apps, and clear cache and data from the Google Play Store app. Reboot/retry.

Go to Settings->Apps, and clear cache and data from Google Play Services (You might need to enable "show system (apps)"). Reboot/retry.

Uninstall Google Play Store updates.

Switch off downloading "only via Wi-Fi" (if also using a SIM card or if you can download via the hot-spot of your phone).

Turn off 4G data transfer and turn it on again (if you use the hot-spot from your phone, turn Wi-Fi off/on and/or mobile data off/on).

Sign out of your Google Account, restart your head unit and sign in again.

And you can look at this Google support article, or this one (more steps ..)