Trying to unlock my Sony Ericsson W20 Zylo IMEI 01238200-932875-6

The phone will ask for "Sim network unlock pin" when you try other network Sim card on a carrier locked phone. To unlock the carrier lock of Sony Ericsson Xperia X10 you can use unlock code. You can get the unlock code from MobileUnlockSolutions.com . There you have to give your Country and current network name along with your IMEI number to get the unlock code. Enter the unlock code when the phone asks for "Sim network unlock pin" to unlock it.

Sony Ericsson Zylo

no wifi - your using 3G data internet
if your downloading big data or file sometimes it failed because it can't handled big files. try 1-100kb files if 1-3MB can not.

Free SonyEricsson Zylo W20 themes download
http://www.mpbus.net/SonyEricsson-ZyloW20-2148/Downloads/SonyEricsson-3-1-0.htm#SonyEricsson hope this helps

To unlock the Sony ericsson W20 You can use the unlock code,You can get the unlock code and instructions from here
Theunlockspot.com
and Unlock it from Network lock,You can enter the code using the instructions below:

Sony Ericsson W20 Unlocking InstructionsWarning : Do not enter any wrong unlock codes on your Sony Ericsson W20 mobile phones. If you enter over a certain amount of wrong unlock codes on your Sony Ericsson W20 mobile phone, your phone may get hard locked and sometimes become unusable.
1 - Switch ON your Sony Ericsson W20 without any SIM Card,
2 - Press the left arrow key/button once,
3 - Press the button * twice,
4 - Press the left arrow key/button once,
5 - The message "Personalize with MNC2" will appear, (or you will have displayed an unlock menu, select the lock you want to unlock)
6 - Enter the Unlock Code.

For the best unlock code for your Sony ericsson model mobile, visit this site http://www.theunlockspot.com/sony-ericsson-w200i/rs10wp9/
It provides the step by step instructions and easy methods for unlocking your mobile phones........

my sony ericsson k510i is locked to orange but tells me invalid sim even with an orange sim card in, why?

i know only unlocking..Unlocking your phone will enable you to use a sim card from any mobile network, in any country. Using the serial number of your phone, sony provide a remote unlock code to lift any restrictions currently placed on your handset by your current network provider. You will get a true Manufacturer's code directly from Sony Ericsson factory. This genuine factory unlocking code is compatible with any Sony Ericsson phone..

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you can take the phone to a mobile service center that unlocks phones and have it done there or try online www.topsony.com, www.gsmliberty.com.

you can do that online or take the phone to a mobile service center or mobile technician.