I bought a htc desire 526 g+ mobile on apl2016. The touch pad of this mobile is some times working and some times not.so I went to the coustmer service center to fix my problem.i said my problem as written above . the mechanic said it needs a software up grade .then I said them to shot out my problem. After some time they return my mobile and said your your problem is solved. So I paid 413rupees and come. The service center is on the 1st floor. I was at the ground floor and I chequed my phone how it is working. I found the same problem is arrising again. So I went up and asked again. They said that they cant help me more. They have already done , what could be.