I bought a duo phone to use dual sims. However, the SIM 1 (2G only) does not receive calls to this active sim card phone number in spite of it being 'on' in settings. If anyone calls my sim1 number it goes straigth to answer service and does not alert me. Can anyone offer any guidance on how to make this work.? My SIM cards set up: SIM2 - LTE/3G for UK sim. SIM1 - 2G for Hong Kong sim.
... View more