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[Simon Raffeiner <sturmflut@xxxxxxxxxxxxxx>]

This is caused by bug
https://bugs.launchpad.net/ubuntu/+source/ofono/+bug/1449990 .

O2 Germany recently merged with E-Plus and created a National Roaming
Network out of both networks. Ubuntu has no support for National
Roaming, and Michael seems to be in a spot where his phone correctly
chooses to roam to the E-Plus Network (shows up as "o2-de+" in the
screenshot) because of better coverage. So he ends up with both SIMs in
Roaming mode.

As I wrote in the other bug, this will only get worse over time because
we already have lots of markets with National Roaming, the bq phones
have two SIM slots and the EU plans to abolish Roaming fees. So we need
support for National Roaming in the short-term (Android has it already,
so there should be source code lying around) and more fine-grained
control over Roaming in the long-term.

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https://bugs.launchpad.net/bugs/1462208

Title:
  Roaming neccessary even in national home mobile network with two SIM
  cards.

Status in ofono package in Ubuntu:
  Incomplete

Bug description:
  When using two SIM cards from different countries, here Germany and
  Ukraine, I have to activate "roaming" as dataconnection to obtain
  mobile internet access, even in my home network in Germany.  As a
  negative side effect I will be unable after changing to roaming for
  data connection to receive calls and SMS on my Ukrainian mobile
  number, as the network provider immediatly refuses this SIM card. It
  seems that the phone tries to get for both SIM cards roaming access,
  for which the Ukrainian card is not registered.

  Provider Germany: O2
  Provider Ukraine: MTS Ukraina

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