Operation Manual

AT-S3D Dual SIM Phone Manual
Page76of84
Unabletoswitchon
1. Doesthebatteryhavepower?
2. Isthebatteryplacedcorrectly
SIMfailed
1. TheSIMcardisdirty.Cleanit.
2. ReinstalltheSIMcard.
3. TheSIMcardisdamaged.Replaceit.
4. (ThesametoSIM2)
Poorsignals
Check thesignal strength icon onthe screen. If
theiconcontains5bars,itindicatesthesignalis
the strongest; if below 2 bars, it indicates the
signalisverypoor.(ThesametoSIM2)
Unabletodialout
1. Maybe you have set Hide My Caller ID
but your network operator does not
providethisserviceforyou.
2. Stronginterferenceexistsaroundyou.
3. Maybe you have activated the call
restrictionfunction.
4. MaybeyouhaveactivatedLine2butyour
network operator does
 not provide this
serviceforyou.
Unable to charge the
battery
1. Thebatterymaydischargetoomuch;soit
cannotbechargeduntilitisconnectedfor
certaintime.
2.  Itsperformancehasworsened.
Unable to register to the
network
1. Tooweaksignalsorstronginterference.
2. SIM card installed properly? Bad contact
or SIM card damaged? If the SIM card is
broken, please contact the network
operatortoreplaceit.
Photostakenaretoodark
1. Check if the too low photo brightness is
set.
2. Checkifambientrayistoodark.