mobile

Dear Sirs,

I am new to these forums and a beginner for rooting and all other stuff.
Kindly let me know how to install a light stable rom lollipop on my vs980.

have recently bought this phone and its unlocked to all networks i guess.
I am from Pakistan.

I have recently roted the set by stump method and have successfully replaced the file of hotspot to let it work on my phone.
Currently i am on 4.4.2 kitkat build: KOT49I.VS98027A

I have twrp installed on my device

After replacing this mod for hotspot my phone get restarts frequently and i am receiving to force close errors (unfortunately location stopped and unfortunately video call has stopped).

Please inform me any remedy for these two issues and guide me how to install lollipop and have all features including hotspot and gps working and with root access.

Sorry for the bad english. I have searched out the forums and have seen several posts for installing roms but i am confused as i dont know what boot stack i am currently on and what should be the steps to be followed in order to successfully install lollipop.