A few weeks ago, my fairphone 2 (Fairphone Android 1.4.2) started rebooting everytime on slight shocks, e.g. when I dropped it from 5 cm onto a wooden table. Lately it also started rebooting even from just taking it out of my pocket or putting it on a table. Every 5 or so reboots, the "Android is Starting" "Optimizing App x of xxx" shows up, which makes the phone basically unusable.
I could not figure out what it could be, it did not start after an update or a heavy drop (I handle my phone carefully). The sudden reboot is reproducable reliably by droping it (from 1 cm) vertically on one of the edges. Very early after I recieved the Fairphone, I noticed a really slight noise when shaking it, like a loose part, might this issue be connected to the reboots?
What I have tried so far (Following advice of these pages: General Troubleshooting, Random Reboots)
Took out all sim and sd cards
Performed a Hard Reset
Opened FF2, took out all the modules and put them back in (in case there was a loose connection)
none of it made any difference. It seems to me that it's a hardware issue.
should I contact support? can I try something else?
Thanks for your help.