Can't use mobile data on non-default sim, even if inactive when the second sim is open call I'm using OnePlus 7T with dual sim.
Sim #1 is my default sim, and Sim #2 is a data sim which I'm using only for mobile data.
Obviously, I've defined Sim #1 to be the default sim for calls and sms, and Sim #2 to be the default sim for data.
When I'm in an active call on Sim #1, Sim #2 is automatically blocked.
However, instead of using Sim #1 for data, the phone is simply not getting any mobile data at all.
Any ideas on tackling this problem? Thanks.
It all depend on your network strength and ability to handle voice + data.
Like 4G VoLTE has no issue about this. It can handle voice and mobile data simultaneously.
If you have other network, then make sure in your area network strength is high and your sim provider can handle both voice and data simultaneously.
Also mobile hardware and android os has features to handle voice + data.