I dont have a solution if its completely locked and doesnt even show an ERC
shops will give you sd one time and unlock it for 500 min
permanent card for 2500 min.
So either is not worth it. Do what i did go to your market like Sultan ka Khoo or Bilal Jung find a shop that unlocks these and give this lcd to him and buy a new one from him chinese one. They will take the old one back for 1000-3000 if you buy a new one from him. A very decent Android one costs only 14-15k. Non android starts from 6K-10K
I gave my old one and bought a non android with shitty graphics one for 6k including giving the old one back and installation charges. My new one has shitty graphics but has every feature you can think of i am enjoying it to the fullest