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Tuesday, 4 June 2013

No Data Connection (Android)

No idea if this actually helps, but... # Permalink C Comment

Just spent an age dealing with a phone (Samsung Galaxy S2, I9100, on the UK network 3) running a custom 4.2 android build which, despite having perfect signal and nothing having been changed, steadfastly refused to even attempt to establish a data connection.

Things I tried included

  • Repeatedly toggling airplane mode and all the various 'data enabled'-type settings knocking around in the menus.
  • Pulling the battery and SIM out for a bit.
  • Changing the APN settings, including resetting them to default, trying my own ones, removing the "APN type", changing the "APN type" to "default", ...
  • Dialing *#*#4636#*#* (that's "info" in the middle there) and tweaking the preferred network type, toggling the radio, using menu -> "Enable data connection"...
  • Updating the ROM.

Literally none of these did anything. Then, later, when I ran "logcat" in a terminal emulator in desperation to stare at the output as I toggled data and airplane mode, it immediately worked. Coincidence?

Yes, it turns out my carrier network was down. Siiiigh.

PS: the *#*#4636#*#* thing was quite interesting. The relevant bits were "GRPS service: Disconnected", "GSM Disconnects: ========DATA========", "PPP sent: 0 pkts, 0 bytes / PPP received: 0 pkts, 0 bytes". I note that even though it's all working fine now, the "Data attempts: 0 / Data successes: 0" still look a bit odd.

Posted by carl at 09:22

Filed under: Computing

Journal from June 2013

All entries from month June 2013

Simple diagrams for LaTeX with Inkscape • 1.7.2013 Yesterday I discovered how to make nice, simple, elegant diagrams for fairly painless inclusion… [read more - comment]No Data Connection (Android) • 4.6.2013 Just spent an age dealing with a phone (Samsung Galaxy S2, I9100, on the UK network 3) running a… [read more - comment]Android/BusyBox Segmentation Faults • 30.9.2012 Just had a terrifying moment when, after attempting to install BusyBox on an Android device,… [read more - comment]Temporarily Redefining In-built Mathematica Functions • 16.7.2012 Suppose a package you're using is, say, zealously Simplifying lots of Mathematica expressions… [read more - comment]Nuclear Power • 24.7.2011 I've never known the answers to the big questions about energy. I do know that with … [read more - comment]
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