1. System stability improved.
2. Screen display bugs fixed.
3. Russian language added.
Please be aware the device might be broken if power down during upgrading.
Please be careful about the charger. The original charger is highly
recommended for upgrade, better in car environment with power on situation.
If you upgrade at home, please aware of the power adaptor can provide
sufficient 5V/1A output.
Please avoid using mobile phone USB charger which offer less than 5V/1A
output.
Insufficient power supply might lead to upgrade failure.