Airtel 3G Issues

I recently updated my S4 nonLTE version using GEARCM13 rom (7/7/2016)

and tried flashing various modems but cudnt solve the 3g issue

2g works fine but when 3g is set, it goes into emergency mode
tower is not an issue since it works fine in another mobiles

Rom Info....
OS 6.0.1
CM version 13.0.20160711-Unofficial-GearCM-i9500
CM API Level Fig(6)
Baseband Version i9500XXUHOD4
Kernel Version 3.4.5-cm-gd795889root@alberto96-pc #1
Build date Mon JUl 11 12:18:25 CEST 2016
Build number cm_i9500-userdebug 6.0.1 MOB30R f4e3ecc2e7 test-keys
hope its enough

please someone give me a reply to it have been searching for months to solve this problem

[INDIA] [Airtel] LTE not available

Hi Guys ,

My Nexus 6P shows only "H" symbol inspite of selecting LTE. As far as i know "H" stands for 3G only. I have airtel provider and i have a 4G enabled SIM as well.

Or does airtel not support LTE bands here in India ?

Can any indian 6P users shed some light on this please ?

Sent from my ONE A2003 using XDA-Developers mobile app

No Signal on AIRTEL after Reviving Hard Brick

Hello guys, sorry for posting in this forum.
But I am facing a serious issue in my yureka.

MY PROBLEM IN A NUTSHELL,
I have revived my Hard Bricked Yureka by Flashing CM12 Fastboot images, Now I don't get Signals particularly on AIRTEL SIM, I also replaced with new AIRTEL SIM still doesn't works. Kindly provide a solution. AIRTEL is my primary Sim.

MY PROBLEM IN DETAIL
I had hard bricked my yureka by accidentally disconnecting yureka during Fastboot flashing of CM12 Fastboot images from RR 6.0 ROM.
Then after following many guides on reviving hard bricked yureka here and on XDA, guide here on yuplaygod forum by Mr. Naved Ansari has worked for me.

But now I'm facing a very strange issue, Yureka is as normal as it was before except AIRTEL doesn't gets any signals.
Then I tried many combination like flashing Kitkat, Marshmallow, hard brick ing multiple times and reviving multiple times. Still I don't have the success. I'm getting signals on other Sim but not on AIRTEL. Suspecting AIRTEL SIM is a problem, I got new Sim of AIRTEL but still it is not working. During many trials I had it had worked for once on CM12, but after i restored TWRp backup of updated CM12. 1, it's gone again. I'm finally reviving my yureka by flashing CM12 Fastboot images.

Kindly help, AIRTEL is my primary Sim and I can not let it go.