No LTE HTC 10 Sprint Nougat/Oreo !

[Ahmed Xperia p]

Ht c 10
Sprint
Unlocked
S-On

When i purchased this phone it was running Viper nougat rom with functional LTE
I updated to oreo firmware and lte gone. It would only show 3g where as i am in full lte coverage zone
I flashed different oreo and pie roms but fruitless
I tried to fix by erasing modemst1 and 2 but it always give error of 35 partition
Today i downgraded to Nougat and erase persist but it is still same
i can only get 3g no 4g or lte
I tried network reset by ##72786# but it eventually sim locked my phone and i had to unlock it manually
Any suggestion or possible fix
Thanks in advance

 

[cigarpill]

did you find the answer?

 

[silentdeath631]

I have also lost connection. Except mine is both 3G and 4G. Oddly I can still call, text, use wifi and putting the sim in my other phone works just fine. I have no clue what's wrong. I've tried everything at this point.

Here's a link to my thread if you wish to follow any solutions provided if someone comments.

https://xdaforums.com/htc-10/help/internet-connectivity-htc-10-please-help-t3946949

 

[methob]

It had same situation but eventually I solved it. Now LTE is working. First of all, need to be S-OFF and then after unlocking SIM, you can install any firmware with any ROM that supports the encryption...Either US unlocked or UK International Roms will fix the LTE issue. One thing to notice: you must keep the data partition unformatted for keeping the SIM lock status and need to use SPRINT or VERIZON radio. I am using stock Oreo from with Verizon radio + Magisk.

 

[methob]

In addition, I unlocked LTE bands as well with DFS Qualcomm tool