Device

• Why is the compass sometimes inaccurate?
• Why do mobile phones often drop in some places?
• Why is the handset always changed into vibration?
• The mobile phone cannot be found by other Bluetooth devices.
• The mobile phone cannot be powered on properly.
• Whether the built-in music player of the mobile phone system can display basic music information.
• When the mobile phone downloads or installs the upgrade package, the system prompts parsing failure or installation package verification failure.
• The mobile phone shows that the internal storage space is insufficient.