IssueTracker

I can attest that Yakju 4.1.2 update on stock Galaxy Nexus broke radio, bluetooth and wifi. The phone enters airplane mode on its own. The radio loses all telco signal (only recover after a 10 second airplane mode). Bluetooth pretends to connect but the headset is unusable. Wiifi that the same issue as bluetooth.

All in all, the phone connectivity is in a really poor state. Most people could not reach me today and I had to keep checking the phone the whole day to see if the radio/wifi was still working which it mostly wasn't.

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Same on nexus S, wired tethering

Vert bad bug...

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Same issue. Cannot tether.  Wifi will connect and assign an IP.  No throughput.
Version 4.1.2 Build JZO54K

Update, Bluetooth tether works. Wifi does not.

same thing here. Want to get back to previous version :(

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I have the same issue. 4.1.2 broke wifi tethering

I reverted back to 4.1.1, out of curiosity, what is everyone's frequency? i'm using   850/1900 HSPA. My theory is that 4.1.2 breaks tethering in some way.

Same to me. Cannot tether.  Wifi/usb will connect and assign an IP.  No throughput.

Same here on the nexus S.

I was having the same problem but I spoke to my network's help line, they made a setting change on my line and all is working again now.