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[John McAleely <john.mcaleely@xxxxxxxxxxxxx>]

** No longer affects: ubuntu-system-settings (Ubuntu RTM)

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https://bugs.launchpad.net/bugs/1379412

Title:
  SIM selection for mobile data is non-deterministic

Status in Canonical System Image:
  Incomplete
Status in Ubuntu UX:
  Fix Committed
Status in ofono package in Ubuntu:
  Confirmed
Status in ubuntu-system-settings package in Ubuntu:
  Confirmed

Bug description:
  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.

  <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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