Reception differs between two same-operator SIMs

asked 2018-04-01 13:42:34 +0300

Federico gravatar image

I have a dual-SIM Jolla C with two SIM cards from the same operator, as I use one for calls and one for data. It happens to me quite often that the reception differs greatly between the two. For instance, as I am writing, SIM1 (call) can get no network signal, while SIM2 gets strength just below the maximum in the indicator. What could be the cause? Any ideas on how to fix this?

edit retag flag offensive close delete

Comments

Are both SIM cards using the same technology (2G/3G/4G) when this happens? Is it the same operator only technically or is it really the same brand? (Like: Most people know that brand B is, in fact, owned and operated by operator/brand A and expect the same network infrasructure. In many cases they will b disappointed.)

ossi1967 ( 2018-04-01 15:52:53 +0300 )edit

@ossi1967 Both cards are set to "prefer 4G". SIM2 is apparently using 4G (it is displayed in the indicator in the top right of the screen); SIM1 can't connect to the network at all. The SIMs are from a "real" cell phone company (TIM/Italy) who owns their own network, not a random MVNO.

Federico ( 2018-04-01 16:00:34 +0300 )edit

When both SIMs are connected, is there a way to check which technology each one of them is using? I only see a single 2G/3G/4G indicator in the top bar.

Federico ( 2018-04-01 16:15:48 +0300 )edit
1

Jolla C is a dual standby device, so both sims cannot use the same technology at the same time, and this is likely the difference you're seeing

r0kk3rz ( 2018-04-02 12:28:57 +0300 )edit

@rokk3rz: But doesn't "dual standby mode" mean, that one SIM is completely disabled while the other SIM is in use, independently of the used technology (2G,3G, ...) ? BTW: I have the exact same problem than the OP! SIM 2 shows 4G while SIM 1 has no signal at all, even if SIM 2 is deactivated! And, strange enough, the problem moves with the SIM card if I switch the slots. Might this be a problem of the SIM card itself, that may not be 4G-ready (the problematic SIM is several years older than the working one)?

Kohle ( 2018-04-27 12:27:49 +0300 )edit