The X10 III has far inferior GPS performance under SFOS than stock Android.
- Phone is much slower to acquire lock than Android in all cases.
- Phone is unable to get lock at all if signal is weak, regardless of number of satellites seen, or time.
- Phone detects and displays the sats quickly - same as android. It just cannot lock or is slow to lock.
This appears to be the long existing bug that afflicted the XA2 also. The 10 III has better GPS generally that the XA2, but the basic issue appears to be the same one.