Common problems with Samsung phones include cracked screens, frozen screens, battery drain, the phone not powering on and the Wi-Fi not connecting. Audio and microphone issues, camera issues and overheating are also common. Other problems depend on the specific model.
Owners themselves can often fix common problems with some basic troubleshooting steps, such as powering the phone on and off again for a frozen screen. Problems that may require repair or replacement after the owner performs all troubleshooting are the phone not powering on and overheating. For cracked screen, Cell Phone Repair advises that without a warranty to cover physical damage, the manufacturer's service is most expensive since it prefers replacement over repair.