T-mobile US signal strength issues?

[Moodock]

Greetings all, thanks for any help!

I got my Xperia Z4 LTE (US Version) Tablet, after being a longtime owner of a Xperia Z2 LTE Tablet which I left on an airplane to never see again.

And now I'm on a replacement unit experiencing some odd behavior that I chalked up to being a defective unit, but getting the same behavior on the replacement.

My Z2 would always show full bars LTE here in Los Angeles, but the Z4 is showing LTE no-to-low bars sitting right next to my LG G4 showing 4GLTE with full bars.

The weird thing is if I go into the About/Signal strength in the settings it shows practically the same signal strength on both my LG G4 and the Xperia Z4.

If I do speed test and get similar results on both devices.

But, If I switch to WCDMA preferred I get full bars! Weird.

Anyone have an idea what I am seeing? Is this normal? I mean it seems to work ok, but my OCD can't handle looking at my tablet with no to low signal strength!

Any help greatly appreciated!

Thanks,
-ben

 

[Limeybastard]

Bars on my Z4 shows one to no bars, but the db strength via LTE discovery is -100db which is better than my Samsung S7 edge which shows 4 bars but -105 db in the application LTE discovery.

 

[Moodock]

Hmmm...that's an interesting app. Gave me some new information that may explain.

One thing I got from running that app is that the devices show frequencies they are using differently:

My TMobile LG G4 shows:
DL EARFCN 19500-2399
UL EARFCN 19950-20399
DL Freq: 2110mhz-2155mhz
UL Freq: 1710mhz-1755mhz
LTE BAND 4

My Xperia Z4 shows:
DL EARCFN: 2300
UL EARCFN: 20300
DL Freq: 2145.0mhz
UL Freq: 1745mhz
LTE BAND 4

It appears that the TMobile branded LG G4 is using a range, and Xperia Z4 is locked on a single frequency, which may explain the low signal bars issue.

Can anyone confirm this? Is there a way to update the frequency ranges on the Xperia Z4 Tablet?

Thank all for looking!
-b

 

[Limeybastard]

My z4 tablet shows the exact figures per what your G4 you listed above shows.

I'm actually comparing the z4 tablet on T Mobile and a ZTE ZMAX pro right now. I don't know what most these figures mean.

I did notice however under the section neighbor cells the ZTE switches between 1 and 5 cells whereby the z tablet is only showing 2 neighbor cells.

Also more differences under the show advanced data section. Both devices locked onto band 4 LTE.