dual sim diferentation on signal level

[dim05]

I just bought the E4 dual and have inserted two sim cards from the same provider. I notice that always the signal level is different between the two sims. The first one is always 2/4 bars and the second is always 4/4 bars. E.g right now the signal level is -94dbm, 11asu for the first sim and -79dbm, 17asu for the second sim. Is this normal for dual sim phones or for E4 dual? I would expect that for the same provider, the signal level should be the same.

Please check your dual sim phone signal level and report whether you have the same situation.

Although there is a difference in signal level, I don't have any problem when I'm on a call with quality and reception. On the other hand this behaviour doesn't seem correct.

[xperiaperson]

What is the type of signal for each (edge, umts)? You probably have 3g (which has a weaker signal) on first and 2g on the second SIM. That's how dual phones usually work.

[dim05]

Both sim belong to the same telecom company and both sim are working on 2g\gsm network. So it's the same radio network\technology that serves both sim. Actually it's a european provider that has the best reputation on signal level in the country.

[xperiaperson]

I'm not really sure how exactly dual phones work inside. If they have two separate antenna, or separate chips that control the Sims it could be one is of different model or faulty, could also be a software issue.
I guess you could try boot in safe mode, and afterwards try a repair with pc companion if you don't mind setting up your phone again afterwards.

[dim05 · Accepted solution]

Hello again,

I switched the places of the two sim cards in slots and I noticed that the same behaviour was reproduced on the same sim. So it doesn't seem to be a problem of the phone but a radio network bug/feature. I'll try to test with a sim from a different operator and report to you the outcome.

[xperiaperson]

Good idea, although chances are minor, it could be a faulty SIM card.