My sony ericsson cybershot c902 will not switch on .I turned it off as it was showing no network coverage,i then tried to switch it back on and it wouldn't let me,the battery was very low so i tried to charge it but it doesn't show if it's charging,theblue light at the side comes on and then goes out and a couple of times it did show the sony ericsson logo but went straight out again.please can you help!

The C902 is a camera phone by Sony Ericsson.
If you purchased your C902 with a cellular plan, it would be locked to your company's network and can only be used with that network.
If you want to switch networks and continue to use your C902, you have to get it unlocked from the current network.
The simplest way to unlock your C902 is through remote IMEI unlocking.

1.Obtain the unlocking code for Sony Ericsson C902 from your network's support desk.
You can call them up and talk to a customer support representative.
Request the unlock code and give them the phone's IMEI number.
As an alternative, you can purchase the unlock code from the websites such as Unlocking,
FonesZone or UnlockItNow.
You will need to provide the IMEI number on the websites.

2.
Close all applications to reach the standby screen of the phone.
3.
Press the left direction key on the navigation pad.
4.
Press the * (asterisks) key twice.
5.
Press the left directional key once again. You will see a menu titled "Personalize."
6.
Select "Network" in the menu. Select "MNC2" in the second menu that appears.
7.
Enter the unlock code you obtained in Step 1 and select "OK." This will unlock the phone.
http://www.mobileunlockguide.com/sony-ericsson-c902

To Unlock Sony Ericsson Cyber Shot C902 use Unlock code ...Visit the site
Theunlockarena.com/sony-ericsson-c902/rs13wp9/ get unlock code and Unlock it easily.

You can get the Unlock code from here Unlocking4u.com/unlock-your-phone/rs6wp2/ and Unlock Sony Ericsson C902 from network lock.

Check your sim card is working if working and operator provides network coverage in ur area. May be there is problem with phones network IC.

select the automatic network selection option in network settings

it may be due to network lock,
you can unlock it and switch over to another network,try unlock codes here http://www.mobile-unlocker.com/sony-ericsson-c902/rs2wp9/
you need to specify the country and network provider

Hi! I went through this tonight with my Cyber Shot too. There's a software update you need to install from the Sony Ericsson site. I've got the link to it and the information about it here on my blog - http://jackcullen.blogspot.com/2009/12/sony-ericsson-c093-dilemma-network-3.html

Thanks,

Jack

yes, there's software updates available on the sony ericsson website. if this doesn't help, take it back to the shop you got it for and they should send it away and fix it, or they will replace it with a new c902 (:

Mine did it today :-( first said i had a message coming and that i need to delete some files then restarted itself and now i have no network and i cant access my contacts.

If you haven't made up a code already then the code is the last four digits of your phone number.