Invalid usim card - LG KU990 Viewty

use another sim card

If the Phone says invalid Sim card means it locked to some network,You need to Unlock it.....You can Unlock the Phone,using the Unlock code from here Superunlockcodes and Unlock it.Check code for Your network lock and Country and Unlock it.....Then after unlock it you can use any GSM Network Sim card in the Phone,.

you have to unlock your phone before using it with other SIM cards, try http://www.superunlockcodes.com/ for unlocking

hello sir
when i start my phone then no signal show in my phone
my phone is unlock.
but it not show network

USIM is 3G only SIM card and is working ONLY with 3G enabled devices. LG Cookie isn't 3G device so it won't accept USIM.

This has alos happened to me, I put in the wrong pin 3 times, then as it was laste and it was asking for a puk, I turned the phone off to save the battery, when I turned it back on it came up 'Invalid USIM card' is there anything that can be done?

Is the phone unlocked, because if it is not, and you put a different USIM into the phone than what came with the phone, it will not work.

Hope this helps...

Debbie invalid usim means its been barred by the network, so whom ever the network provider is for the phone you will have to give them a call and ask them to un barr as you have just brought it. We brought on off ebay at christmas on orange as we're on orange and had the same problem. We called them and they took the barr off straight away, no charge. Jan

go to the shop and get it fixed:D

It sounds as though the phone is locked. When I had this happen to my Samsung A707, I had to send it back to Samsung to get it reprogrammed. (There are people who have bought the necessary hardware to interface with a mobile phone's OS, but I preferred Samsung themselves.) This was a free service (except for shipping) from Samsung. If you contact Motorola, they might be able to simply reprogram the phone for you.