Fairphone 2 Wi-Fi reception drops using 5 GHz channel 120

[DeepSea]

I suspect corrosion at the end(s) of the WiFi antennae or a detached connector inside the FP2:

How can I reconnect loose antenna cable

Hi guys, some days ago, my Fairphone 2 fell to the floor. This damaged the RF cable connecting the antenna to the motherboard. The cable is now detached from the connector (probably MHF3). I tried to stick the cable back into the connector manually, but it did not work. I read here that @PorCus managed to re-attach it. Was this referring to re-attaching the connector to the antenna board or the cable to the connector? If attaching the cable to the connector manually is possible, could someone p…

[Singulus]

There have been some Wifi related pulls for LOS, which I can’t assign the 5GHz channel issues, but I’m hoping for improvements everyday ;).

https://download.lineageos.org/FP2/changes
https://review.lineageos.org/282360
https://review.lineageos.org/282359
https://review.lineageos.org/284065
https://review.lineageos.org/284066

[Singulus]

@Patrick1

Android 6

AFAIK Android 6 was not suffering from any Wifi issues, that is one of the main points in the discussion that got lost over time.

[DeepSea]

Well, this one here is rather hardware related:

@simpleShark

By tilting/ moving the phone within few centimeters, I could reach levels from 5% up to 35%

[Patrick1]

Yes it was, but it couldn’t be fixed by FP.

Wifi drains battery after Marshmallow Upgrade - See first post

This is a #wiki post, please help improve it if you have any further information. Issue description: After upgrading to Android 6 some users experience an increased battery drain. For some this goes away after a few days. If it stays and either Wifi or Google Maps show as the main culprit in the battery stats then you suffer the issue described in this topic. Solutions/Workarounds/Tips: Fairphone Bug Status: Rejected This issue was reported as Issue #16 in the official bug tracker, but was r…

Actually the effect has a smaller impact on my battery life than I expected.

[simpleShark]

Checked both ends, but they are looking good to me. Neither corrosion, nor do they seem to be loosened. But wouldn’t it also be strange, that a HW-issue like detached antenna only leads to problems on specific Wifi channels?
While I agree, that the strong effect of tilting the phone sounds more like a HW-problem, the fact that only specific channels are affected does sound more like Firmware/Software/general HW-Design issue to me.

[thomastc]

For what it’s worth, I’m having similar problems with higher 5 GHz channels on my FP2, in particular: anything from 116 through 128 doesn’t work. See my thread here for more details. After finally discovering the cause of these connectivity issues, I simply configured the router to use channel 56, and now all is well.