After flash data network stays on GSM doesn't go up to 3G or H+

I was running my device (HTC One M7 Sprint) with GSM network outside USA, on Bad Boyz 5.0 ROM and then i decided to do a stock restore in order to get lollipop OTA update …
After the flashing my 3G has stopped working i am only able to use GSM data network :( …
i have tried redoing APN settings, factory reset, wipe cache from recovery, fastboot erase cache, Dialing *#*#4636#*#* and selecting WCDMA preferred etc with no luck …

NOTE: 3G for my network works fine on other devices …

So i did flash with Guru Reset M7 Sprint 3.04.651.2 to avoid getting touch screen not working … i ended up just fine with everything and OTA updates but ….

I am no longer able to connect 3G data network on my device now ;-( … it stays on GSM data network and never goes up to 3G or HSPDA+ …

It would be great if you could see that what has happened .. i am ready to provide any info you may need …

My boot loader info is as below …

tampered
ReLocked

M7_WLS PVT Ship S-on RH
HBoot-1.61.0000
radio-1.01.20.1225
openDSP-v35.120.274.0718
OS-6.23.651.7