It is very worst phone. it has many problems like hanging, heating, slow speed, no good camera clarity, some time you can not switch off phone, with internet use I cant receive and calling any call. It will take a hour for switch off the phone while start hanging I am using this Phone since last 1 Years . Mobile looks cool! but the features given were fake. I have faced any problem .The wifi suddenly gets disconnects but it is displayed as active on the screen.HTC is not working. Suddenly switched off then opened but I touch my screen the phone is switched off. What the problem. The phone was dead. Please give me a solution. HTC Desire dual sim is working not bettery & very very low bettery backup, . I am also stucked with the same KITKAT. I need to update to latest. This was the problem I faced while using my dual sime.