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Phone won't switch to 3G or 4G, only uses 2G with any SIM [answered]

asked 2015-02-04 13:47:04 +0200

Venty gravatar image

updated 2015-02-04 13:49:03 +0200

Since a few days, my Jolla will always stay at 2G. It started after it shut down because of empty battery.

In the preferences, I can set it to prefer 4G, prefer 3G, the phone will stay on 2G all the time. This happens with any SIM card with any (swiss) network. My friend, who also owns a Jolla, and I swapped SIM cards, both from Swisscom. Promptly, my card worked at 4G in his phone, while my phone with his card stayed on 2G. I also tried Sunrise and Orange cards, to no avail. My device will not switch to 3G or 4G. And I know for sure that 3G and 4G is available both at home and at work. Also rechecked with a Samsung Galaxy S5.

I have tried switching to flight mode, rebooted the phone numerous times (when switching SIM cards) and also tried restarting the network with the Jolla utility in preferences. Nothing helped yet.

I can make phone calls and Internet over GSM/EDGE is working (though horribly slow, naturally), so the Jolla does work. Also I could switch my Jolla to 4G only using the Radio Switcher app from Openrepos, so it is not a hardware issue.

My educated guess is that something withing CSFB is going wrong here, but I have no proof for this whatsoever.

However, I'd like to fix this but other than a factory reset, I see no other solution, and I'm a bit hesitant going this way yet, so I thought I'd first ask here for any other suggestions what to do.

Thanks in advance

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The question has been closed for the following reason "the question is answered, an answer was accepted" by chemist
close date 2015-02-23 17:40:33.116321

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I opened a ticket with Jolla care but have not heard back from them yet. The sailors are busy =:o)

Anyway, I will probably try a factory reset this weekend, unless someone comes up with a better idea. Using mobile Internet with only EDGE is slow and no fun at all.

Venty ( 2015-02-06 11:20:32 +0200 )edit
1

Jolla Care asked me to do a few tests and send them the result. I will do this at home, since this needs WLAN to log in to the phone from remote and this is not possible at work.

Venty ( 2015-02-06 14:14:08 +0200 )edit
1

Even after a Factory Reset, the issues would remain. It most probably is a problem with the antenna / signal reception. Also 2G signal reception is pretty bad with my particular devise. Have to send it to Jolla for repair.

Venty ( 2015-02-11 15:39:22 +0200 )edit

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answered 2015-02-04 14:04:45 +0200

nick75 gravatar image

Sounds similar to this https://together.jolla.com/question/78614/3g-stopped-working-after-telephone-call-that-ended-because-of-empty-battery/

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Hmm, this says that 4G started working again spontaneously. Well, I don't want to rely on that, although, praying to some nordic god sounds tempting. =:o)

The other case was resolved with a factory reset. Well, yes, I can do this, but I fear that this 2G-stuck bug might strike again.

Venty ( 2015-02-04 14:14:39 +0200 )edit

Yes, I have checked the APN settings.

I don't see the connection between APN settings and which band (2G/3G/4G) the phone uses to register into the cell network though. Especially when I switch SIM cards to different providers and the problem of only 2G being used persists. Swisscom, Sunrise and Orange (the three carriers in Switzerland) all use different APN settings (which are set correct according to their documentations).

Venty ( 2015-02-05 15:45:41 +0200 )edit

My apologies @Venty, You're quite right, I'm speaking B&^%s. Once again, I've misunderstood/misread the question. I'll remove my pointless comment and this one as well, shortly. :)

Edz ( 2015-02-05 20:05:16 +0200 )edit

=:o) No harm done. You were only trying to help and I appreciate that!

Venty ( 2015-02-06 11:17:26 +0200 )edit
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answered 2015-02-23 14:24:34 +0200

Venty gravatar image

Had to send in my Jolla for repair. It probably was an issue with the antenna or something. Result is that I now have a brand new Jolla device (MFG Date 12, 2014), while my old one was one of the First Ones.

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And the new device works like a charm! :)

Venty ( 2015-02-23 14:25:26 +0200 )edit

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Asked: 2015-02-04 13:47:04 +0200

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Last updated: Feb 23 '15