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AT-S3D Dual SIM Phone Manual
Page76of84
Unabletoswitchon
1. Doesthebatteryhavepower?
2. Isthebatteryplacedcorrectly
SIMfailed
1. TheSIMcardisdirty.Cleanit.
2. ReinstalltheSIMcard.
3. TheSIMcardisdamaged.Replaceit.
4. (ThesametoSIM2)
Poorsignals
Check thesignal strength icon on thescreen. If
theiconcontains5bars,itindicatesthesignalis
the strongest; if below 2 bars, it indicates the
signalisverypoor.(ThesametoSIM2)
Unabletodialout
1. Maybe you have set Hide My Caller ID
but your network operator does not
providethisserviceforyou.
2. Stronginterferenceexistsaroundyou.
3. Maybe you have activated the call
restrictionfunction.
4. MaybeyouhaveactivatedLine2butyour
network operator does
not provide this
serviceforyou.
Unable to charge the
battery
1. Thebatterymaydischargetoomuch;soit
cannotbechargeduntilitisconnectedfor
certaintime.
2. Itsperformancehasworsened.
Unable to register to the
network
1. Tooweaksignalsorstronginterference.
2. SIM card installed properly? Bad contact
or SIM card damaged? If the SIM card is
broken, please contact the network
operatortoreplaceit.
Photostakenaretoodark
1. Check if the too low photo brightness is
set.
2. Checkifambientrayistoodark.
77


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