I agree, that a not working phone is really frustrating and the bad support doesn’t make it easy to handle.
But you have to know that the modular concept of the FP2 is one of the first and with supporting and buying a Fairphone you support pioneers with the possibility to struggle with minor and/or major difficulties… Supporting a vision is not always easy, sometimes it needs (a lot of) patience…!
Dosc
A release candidate is being tested in the beta section right now that introduces “Initial improvements to the proximity sensor calibration” so it might be worth testing to see if it fixes/reduces this issue.
See here how to get access:
https://forum.fairphone.com/t/testers-for-fairphone-os/18671?u=paulakreuzer&source_topic_id=12454PS: I’ll just mark this as a solution for a short while to increase visibility.
The sensor improvements are not included in the 1.5.1 release and are postponed to the next update.
Yep me too. Endind calls with power button is fine a s a workaround but automated calls which require dialing through a menu are impossible!
Thanks this really helps - it’s been bugging me for a while. If I make sure I hold this part of the phone to my ear then it doesn’t switch off during calls. 
hey guys,
I have a strange observation:
the proximity sensor on my fp2 stopped working too, cleaned it, reassembled it, worked again. some weeks later, it stopped working again.
I use Sensor Sandbox to read out the Signal, see screenshot.
Normally I get value zero. since it is not working correctly. When I apply pressure near the proximity sensor using my thumb and first finger (kind of squeeze the phone), I get value 5.0. This persists, until I hold my hand over the proximity sensor, then I get zero. So it is working normally. But when remove my hand, it stays at zero.
Didn’t try yet, if this works during a phone call. Can somebody try and confirm this behaviour? Could be a workaround 
There’s also a way to recalibrate the sensor in 1.5.1 - it’s mainly been brought up as a fix for people who’s phone doesn’t properly detect when the sensor is uncovered (which you seem to also be describing). There’s instructions in the first post of the topic linked below, in case you want to try:
Thank you, but does it only work for 1.5.1?
I use FP Open OS 16.07 and it doesn’t… the calibration up just does not start.
The calibration is not yet included in FP Open OS updates. I’m waiting for it as well.
I’m also waiting for the calibration tool in FP Open. The phone was completely fine for a while and suddenly last week I also start having this issue. I hope it’ll be solved soon 
several time happened while I was calling when I wanted to end the call I had a bleak screen nothing worked neither screen nor buttons
Since FP OSOS 16.09 the calibration tool is available and since I recalibrated the sensor using the tool, it works as it should.
Go to Settings > Maintenance > Proximity sensor to find the tool.
I have had the problem, too. After reading about this mentioned function (Settings > Maintenance > Proximity sensor, in the German version: Einstellungen, Wartung, Näherungssensor) the proximity sensor has been newly calibrated, and the problem has gone!
Everything’s fine now!!
Even after running the calibration tool (settings > maintenance > proximity sensor) for several times on my brand new FP2 the problem of NOT turning off the screen during calls prevailed. I am on Fairphone OS 1.8.1.
The solution that solved this for me:
Using the app Sensors as recommended by fairphone support here I verified that the point at which the proximity readout switches from 5cm to 0cm was further away (at about 2-3 cm and not like before at about 0-1cm).
Now the display is switching off when I hold the phone close to my ear (without even touching my ear/face at all) and switching back on when I take the phone away from my face. Before I had to press the phone against my face in a very certain angle which I now luckily don’t have to worry about anymore.
Hi,
When using the Fairphone 2 for phonecalls the screen stays active. This makes it really hard to have proper phone conversations as other functions are being (de)activated and it has happened more than once my ear has ended a phonecall…
Please check out the support article linked in the first post
I have really a lot of problems with the proximity sensor. While making a phonecall, may fairphone doea various things, like switching on the flashlight, turning into mute, calling someone, showing the battery charge … calibrating the proximity sensor does not help. This problem is really annoying, because first of all i need a phone.
I’ve moved your post to this topic, as it’s more relevant to the issue you’re describing and you may have better luck using the method described above.
A post was merged into an existing topic: FP2 Screen can’t be reactivated during/after calls - See first post for Workarounds
A post was merged into an existing topic: FP2 Screen can’t be reactivated during/after calls - See first post for Workarounds
It was good to see this as it takes us to how to calibrate the sensor, i am sure this calibration has helped in my case. Thank you!
