Comment 3 for bug 1409694

@Dave

On a fresh install, even though SIM1 has the 3g capability by default, SIM2 will be used for data. This was discussed and a solution proposed for the wizard to prompt the user as to which SIM should be selected for data, however this was rejected by design. See bug #1379412 for the details. Also, please note the original bug description is correct. The bug's last comment seems to allude that the first SIM would be used for mobile data in some circumstances, however this is incorrect, SIM2 will be used.

As for the mobile data setting switching on it's own from SIM1 to SIM2, I haven't been able to reproduce, so I'm re-assigning back to you until we have a reproducible scenario. Perhaps you might touch base with Alfonso tomorrow as he's in your time zone. I'd like to get his opinion, and maybe see if he can reproduce if you can come up with a repeatable scenario.

Note, my testing was performed with two T-Mobile SIMs, the first active, the second a pay-as-you-go with no credits. I flashed the latest stable RTM, and confirmed that SIM2 gets selected by default for data. This happens regardless of whether or not SIM1 has a PIN lock enabled.

current build number: 13
device name: krillin
channel: ubuntu-touch/stable