Specification updated.
<https://wiki.ubuntu.com/Networking?action=diff&rev2=289&rev1=288>
Following Alfonso's and Tony's feedback, the rule no longer includes
signal strength, roaming, or recalculating. It still does include
locked/unlocked and 4G/3G/worse.
** Changed in: ubuntu-ux
Status: In Progress => Fix Committed
** Description changed:
Our current implementation of SIM selection for mobile data is currently
( as of RTM #94 ) non-deterministic.
If two SIMs are installed in the phone at first boot ofono will self-
power the ConnectionManager interfaces for both modems which results in
the 'Powered' property of both being set to 'true'. Only one of the
two will attach to the network however, and if both SIMs are unlocked,
this is usually the second slot.
Note, if the second SIM is locked, then the first SIM is used for mobile
data.
The cellular system settings uses the 'Powered' property to choose which
SIM is selected, so the current behavior is clearly broken.
- It was suggested that we should change ofono to not self-power it's
- ConnectionManager interface, and instead add a wizard page that allows
- the user to choose which SIM to use for mobile data.
+ <https://wiki.ubuntu.com/Networking#cellular-mobile>: "On a dual-SIM
+ phone, “Cellular data:” should instead be radio options for “Off” and
+ each SIM. After first setup and SIM unlock prompt (if any), this setting
+ should be set by default to the only unlocked SIM if there is only one,
+ otherwise the only 4G SIM if there is only one, otherwise the only 3G
+ SIM if there is only one, otherwise the first SIM."
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https://bugs.launchpad.net/bugs/1379412
Title:
SIM selection for mobile data is non-deterministic
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