Siemens U15 User Manual download pdf (Page 161)

Troubleshooting

160

The display

says:

SIM Blocked

. How

do I unblock my

SIM card?

Call your service provider (the

company that sends you your

monthly wireless service bill) to

obtain the PIN unblocking key (PUK)

code. See page 145.

The display

says:

Enter

Unlock Code

. How

do I unlock my

phone?

Enter the factory-preset unlock code

(1234), or the last four digits of your

phone number (see page 41). If this

fails, call your service provider (the

company that sends you your

monthly wireless service bill).

My phone asks

for an unlock

code when I try

to open a

feature.

The application you want is locked. If

you own the phone but do not know

the unlock code, see page 44.

My phone does

not ring.

If you see a or W in the display,

then the ringer is turned off. To

change the ring style, see page 52.

Also, the ringer may be set to

Silent

even though your phone is set to a

ring alert profile.

My phone rings

even though I

selected the

Silent

(or

Vibrate

)

alert profile.

The ringer may be set to play a tone

even though your phone is set to a

silent alert profile. To change the ring

style, see page 52.

I tried to place a

call and heard an

alternating high/

low tone.

Your call did not reach the wireless

system. You may have dialed the

number too soon after turning the

phone on. Wait until the display

shows the name of your service

provider before making a call.

Problem Solution

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