Sony ST27A User Manual
1
From your Home screen, tap .
2
Find and tap Settings > Privacy.
3
Tap Factory data reset.
4
Tap Reset phone.
5
To confirm, tap Erase everything.
No battery charging icon appears when phone starts
charging
It may take a few minutes before the battery icon appears on the screen.
The battery performance is low
Follow our smart tips on how to get more out of your battery. See Improving battery
performance on page 17.
I cannot transfer content between my phone and the
computer, when using a USB cable
The software or the USB drivers have not been properly installed. Go to
www.sonymobile.com for more detailed installation instructions and troubleshooting
sections.
I cannot use Internet-based services
Make sure your subscription covers data downloads and that the Internet settings in
your phone are correct. See Internet and messaging settings on page 34 for more
information on how to enable data traffic, data roaming, and download Internet
settings. Contact your network operator for more information about your subscription
settings.
Error messages
No network coverage
•
Your phone is in Airplane mode. Make sure Airplane mode is turned off.
•
Your phone is not receiving any network signal, or the received signal is too weak.
Contact your network operator and make sure that the network has coverage where
you are.
•
The SIM card is not working properly. Insert your SIM card in another phone. If this
works, it is probably your phone that is causing the problem. In this case, contact the
nearest Sony service center.
Emergency calls only
You are within range of a network, but you are not allowed to use it. However, in an
emergency, some network operators allow you to call the international emergency
number 112. See Emergency calls on page 37 for more information.
SIM card is locked.
You have entered your PIN incorrectly 3 times in a row. To unlock the phone, you
need the PUK provided by your operator.
SIM card is PUK-locked.
You have entered your PUK (Personal Unblocking Key) incorrectly 10 times in a row.
Please contact your service provider.
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