Specifications

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Areas with potentially explosive atmospheres include fuelling areas,
below decks on boats, fuel or chemical transfer or storage facilities, areas
where the air contains chemicals or particles, such as grain, dust, or metal
powders.
Blasting Caps and Areas
Power off your mobile phone or wireless device when in a blasting
area or in areas posted power off “two-way radios” or “electronic devices” to
avoid interfering with blasting operations.
System update
System supports firmware upgrade only from official website or server.
If user uses 3rd party ROM image and/or any other root method to upgrade
firmware,it will cause phone unstable and raise further security risk and
pitfalls. Please be noted user should take all responsibility for all these
behaviors.
Common fault diagnosis
The faults
possible reasons
Can‟t turn on
1 、 Whether there is electricity in the
battery；
2、Battery is correct.
SIM is wrong
1、SIM is dirty and clean it；
2、install the SIM again；
3、SIM is wrong，replace it.