I can never have dual-sim data switched

[hardywang]

I am pretty sure it is either an OS bug or hardware bug, but I don't know which one it is.I have BLU Win HD with both SIM cards inserted, Wind Mobile slot 1, Rogers slot 2. So by default the cellular data comes from SIM 1, which is Wind.I want to make Rogers my cellular data connection so I go to Settings -> cellular + SIM -> SIM for data connection to pick SIM 2: ROGERS. The phone will disconnect and reconnect from both networks at same time in order to switch the data connection. From this point on I have experienced several behaviours:

• Most of the time after cellular networks comes back, Wind (SIM 1) is always in "away" mode. Since I also have the setting Data roaming options to be "don't roam", it looks like this setting also blocks Rogers network (SIM2) from using any data. I would assume "don't roam" should only be limited to one single SIM not entire phone level.
• There are also a few time after both networks are connected, all the settings are switched back to it was: data is from Wind (SIM1).

I believe if I simply pull out Wind (SIM1), it works fine with just a Rogers SIM. But with both SIM cards inserted I have some trouble.Any idea is it a common problem? Somebody also experienced same issue? Is there a way to fix?

 

[Zulfigar]

Have you tried swapping the two SIM cards locations?

 

[hardywang]

Have you tried swapping the two SIM cards locations?

No, I haven't. BLU's 2 slots are 1 micro SIM and 1 standard SIM. I probably need a SIM cutter first to swap them.

 

[Zulfigar]

Ahh, I see, I think I recall that the data on SIM 1 gets primary function, so swapping the two might actually solve your issue.