Comment 18 for bug 1379412

@Pat

The suggestion from Alfonso was to fix this via a new page in the first boot wizard which would ask the user which SIM they'd prefer to use for mobile data. This would only be displayed if the phone detected more then one inserted SIM.

The general consensus from design was that this was less than ideal and that we should figure out how to do this automatically.

Alfonso and I discussed this today, and it's my belief that we could do this by checking to see which SIM was inserted in the 3g capable slot and only setting the ConnectionManager's 'Powered' attribute to True for this modem. This would require us extending the GPRS interface to allow the ofono core to query the 3g capability of the modem slot, which is a very MTK-specific capability. If we implemented this, we'd need to figure out how to make this more generic.

Note, bug #1413672 is related, and has a fix currently in-review.

Finally, the fix for this bug cannot be deployed as an OTA update, it would require a factory image update, as this bug only occurs during first boot *if* the user had installed two SIMs before-hand. It also potentially could occur if the user resets the phone, but this scenario hasn't been verified.