Ответ на "I have a non responsive touch screen. Can I recover my data?"You can try connecting the phone to the computer and transfer files to the PC or you can use some third party utility to create backup.
Ответ на "Phone stuck on Android is starting screen"If your phone is fully charged, then you can try contacting the manufacturer or service center
Ответ на "Broken internal cable from speaker to headband."I doubt if this can be repaired on your own. Yes, you can ask for replacement if the product has replacement guarantee etc.