12 Appendix

Troubleshooting

Problem

Solution

 

 

The phone does not

The battery is completely

turn on.

discharged. Recharge it

 

fully.

 

 

“Invalid or missing

Check that the SIM card has

SIM card. You can

been correctly installed.

still make

 

emergency calls if

 

your service

 

provider supports

 

it” displays.

 

 

 

Problem

Solution

 

 

The bars next to

• If you have just turned on

disappear.

your phone, wait about 2

 

minutes, until your phone

 

finds the network and

 

receives a signal from the

 

network.

 

• If you are in a tunnel or in

 

an elevator, the phone

 

may not be able to

 

receive the network signal

 

properly. Move to an open

 

place.

 

• This may appear when

 

you move between

 

different service areas. It

 

is normal.

 

 

The phone does not

Remove the battery from

work properly or

the phone and insert it back

does not work at

into the phone. Turn it on

all.

again.

 

Reset your phone.

 

 

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Samsung SGH-I750CSAXET, SGH-I750DAADBT, SGH-I750DAAXEG, SGH-I750DAAXEF, SGH-I750BKAXET manual Troubleshooting, Problem Solution