My New Xperia XA ultra Network tower catching problem!

[UtsavBanik]

At first I bought Xperia M5 dual, but that was a fully faulty device! And at last that got dead! Then After the harrassment of 3 months Sony Center replaced me a brand new Xperia XA ultra.
I'm using it for 13 days till now, I'm facing problem with Network signal! It can't catch the network tower properly! Where other mobile do that with same network operator at the same position with full tower! Always signal bar is just like a dot! Never full! Nither 2 nor 3 bars at least! What the Sony! I'm from Kolkata, and I'm using AirTel sim. Already took a new nano Sim, so no problem from sim or network!
Now help me guys... Plz. What can i do....
Thanks in advance

[Uliwooly · Accepted solution]

Don't rely on the bars, do this with both phones

settings > about phone > status > signal strength > what do you see?

[UtsavBanik]

Ok.

[UtsavBanik]

Its showing,
-93dBM 11 asu
What does it mean!!!

[Uliwooly]

I thought you were going to test 2 different phones at the same location at the same time 

[Uliwooly]

Signal Strength  

-67 dBm	Minimum signal strength for applications that require very reliable, timely packet delivery.
-70 dBm	Minimum signal strength for reliable packet delivery.
-80 dBm	Minimum signal strength for basic connectivity. Packet delivery may be unreliable.

[UtsavBanik]

What will solve my problem???

[Uliwooly]

There's nothing you can do to improve network coverage, that's on your network carrier. 

[sriwalker]

I'm also facing same problem. I think mobile network problem. Why I'm told I changed new bank Sim. But no tower come. I get network tower max 1bar.

[UtsavBanik]

Yeah. Same.