Insert correct usim on a sony ericsson w595.

you can check it with other sim card ,if it remains the same problem ,it may be locked to particular network wont accept any sim card other than the particular network ,you can unlock it and used to other network,try here
http://www.onlinegsmunlock.com/

I have a sony ericsson zylo, the back light constantly flashes and now it is saying insert usim, the sim is fine tried it in another fone , very frustrating ! can anyone hhelp plz

you need to unlock your mobile to the current sim. These can be done using codes. You can get the unlocking codes at www.theunlockspot.com within minutes.

check u phone is all lock or not,is sp lock or network lock,just unlock only.

USIM is the SIM card for 3G networks (U stands for UMTS). It operates under a different voltage level, as compared to the normal SIM card.
Many operators (like mine here) don't make a distintion, related to their service, between them, i.e. I can access the 3G network with my old SIM card. As far as I know, USIM cards shouldn't be put in non-3G phones. On the other hand, 3G enabled phones are able to handle both types.
Just my 2 cents... Carlos

You can always try and call your provider for a compatible card.Some phones you will be able to get a prepaid card for your phone.It all depends on what you want to do.
If you want a regular cell instead of a prepaid,the best thing you can do is call your provider and let them know what kind of phone.
Hope that helps

Un-Clocked is temporary, allows free txt and calls for a few minutes.
Un-Locked from a network is what will allow you to use any sim card on your phone.
Go to:
http://www.kingmobilephone.com/pages/remote-unlock.php

i you should try a software update, you can get this from www.sonyericsson.com/support. hope this helps

Insert any other sim in ur mobile if that is working fine then u need to swap the sim

 

Gizmo1