Can anyone give me a conclusive answer as to whether the dual-sim version is an active or standby version; i.e. do both sim cards remain active during a call or is the card that is not currently being used switched to inactive, i.e. the caller automatically ends up on the combox? I have been searching the net for an hour now, but have not found a satisfactory answer. Many thanks in advance.

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I have the same smartphone, so there is a function where you can choose when a call comes in which SIM it should be routed to. 

You can also switch the mobile function so that it pulls data from both mobiles or just one (this one is selectable). 

hope I could help you :)

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