Dual SIM: can't tether with sim1 if sim2 is present
I have a Be.Social SC020 with Android 4.1.2, which has two SIM slots.
With only one sim inserted in slot 1, I have everything set up properly and I can both use internet from the phone and do wifi or usb tethering.
However, if I ALSO add another SIM to slot 2 (which belongs to another operator whose plan probably does not allow tethering), I can't do tethering any more!!!
Is there a workaround?
My only workaround, currently, is to disable sim2 (and I need to turn Airplane mode on and off so that the change takes effect), so then I can do tethering, and when I'm done with the tethering, I re-enable sim2. But obviously that means that sim2 is offline while using tethering, meaning for example I won't receive calls or sms's on sim2.
I have read around there that there is a bug in Android 4.1-4-2 which silently switches to a different APN when tethering. So I edited ALL the APNs in settings to the same configuration of the one I'm using. The effect of that (curiously) was that even the APNs that were listed under "slot 2" have been automagically moved to "slot 1", so there's no APN now under Slot2. Yet, this didn't solve my issue.
I don't want to use sim2 for tethering, nor for data. I just want to be able to do tethering using sim1 whether or not sim2 is present and enabled.
Has anybody encountered the same problem, and a solution?
Thanks in advance,