Dual SIM phone question about voice call quality

[Sliv]

I have a new Moto G6 with the dual SIM technology. I have one SIM for PM (personal and data) and one SIM for Bell (provided by my work, text/voice but no data). 

I just started with PM and so far it's been fine for texts and data. I actually just received my first phone call today and the caller said they were hearing a lot of static.

They said they would call me on my work number, so they hung up and did that. They said they weren't hearing the static on my work number.

They were calling from a Bell land line. In both calls, they both sounded the same to me, I didn't hear any static.

I don't know if that's just a fluke, or if there's something I should be looking into.

I read another post that someone said to set their phone to 3G, so I've done that, as the PM plan I have for data I don't believe is for LTE anyway. I don't know enough about phone technology to know what that means, or if it has any bearing on voice quality.

I have noticed that the Bell SIM seems to show stronger signal than the PM. When I switched the setting to 3G, both SIMs show full bars and the letter "H" instead of "LTE".

Just wondering if anyone can help me understand a bit better what I should be doing in this situation.

I'm in the Ottawa, Ontario, area.

Thanks 

[will13am]

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@wmleung wrote:

Voice quality and dual SIM don't affect each other.  I have 3 dual SIM phones, 1 by Sky (no name so to speak), 1 by Xiaomi and the 3rd is NUU (another new startup); all of them work without issues.

In my humble opinion, you could be in a spot where the signal is spotty.  Try to move around (sometimes even 5 ft makes the difference - no guaranty though).

If you experience this every where you go, then you might have a defective device.

Good luck.

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Phone technology has matured.  Even the so called no name stuff is fine.  It is like the PC era where we no longer need to buy an IBM PC to get a model that works.  I have tried out 4 different dual SIM devices, RIV R55, Asus Zenfone II, LeEco Max 2, Xiaomi Redmi Note 5 AI.  Talks about a bunch of household names.

[Sliv]

This is the new Motorola G6, unlocked International version.

https://www.amazon.ca/dp/B07CHW5KMY

I agree, one call is not enough to draw conclusions, just wondered if I had done something wrong. I'll definitely try to make some test calls when I can to confirm this was just some kind of random one-off.

[will13am]

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@Sliv wrote:

Thank you, I installed network cell info lite and it says both SIMs are connecting on band 2. I put the phone setting back to "LTE (recommended)". Now it seems the Bell SIM signal is lower, so the reverse of before, so perhaps I just live in a spotty area, I don't know. It says "Voice NW" for the PM as LTE, and for Bell SIM as UMTS.

I gather that the person calling me hearing static was possibly just a fluke, then, not an indicator of something wrong? I suppose I'll try to make a couple calls to someone from both SIMs to compare...

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Definitely one data point is not statistically significant.  If there is more data available, we would surely like to know.  This type of information is useful to others contemplating the service or the phone.  BTW, what model of phone are we talking about here?

[srlawren]

@Sliv you definitely need to have more than 1 call in your sample data to make that determination!  

[Sliv]

Thank you, I installed network cell info lite and it says both SIMs are connecting on band 2. I put the phone setting back to "LTE (recommended)". Now it seems the Bell SIM signal is lower, so the reverse of before, so perhaps I just live in a spotty area, I don't know. It says "Voice NW" for the PM as LTE, and for Bell SIM as UMTS.

I gather that the person calling me hearing static was possibly just a fluke, then, not an indicator of something wrong? I suppose I'll try to make a couple calls to someone from both SIMs to compare...

[wmleung]

Voice quality and dual SIM don't affect each other.  I have 3 dual SIM phones, 1 by Sky (no name so to speak), 1 by Xiaomi and the 3rd is NUU (another new startup); all of them work without issues.

In my humble opinion, you could be in a spot where the signal is spotty.  Try to move around (sometimes even 5 ft makes the difference - no guaranty though).

If you experience this every where you go, then you might have a defective device.

Good luck.

[will13am · Accepted solution]

@Sliv, regardless of plan selection, the connection is generally on the LTE network unless 3G selection is made.  When going to a phone call, the phone will automatically switch to the 3G network because Public Mobile does not offer VoLTE.  With respect to different signal strength on the two SIM cards, I suspect that is because the primary SIM (one carrying data) will be on the LTE network (preferred) and the second SIM is on 3G.  Install network cell info lite and see what bands each SIM is connected to.  This may explain variations in signal strength.  As for voice quality, I have been with the service for roughly 1.5 years and I have never experienced a drop call or poor voice quality.