Demo? Insert sim - Nokia 1600 Cellular Phone

You need a SIM card to make the phone work. If one is already installed it has failed or the card is not installed correctly.

you can contact this store: www.unlocksolution.com

This guyz helps a lot.

My sony ericsson j20i mobile showing "insert sim card or to view the demo of this phone first view demo" at first i thought it was simlock by that network after checking with omnius for SE software it shows the phone is not locked by the network
wat does it mean? why its not detectecing pls help me
my mail id is [email protected]

you can get unlocking instructions here http://www.mobileunlockguide.com/sony-ericsson-t715a

so contact your provider for the code

your sim cant reach the connectors.
Take phone apart wash all connectors
with Isoprophanol to get all moisture and greese
from the connectors.
This will work. Vote!

Is this a new phone? If so check that you've inserted the SIM correctly and it's not SIMlocked to another network

If it's worked before remove the SIM and GENTLY clean the contacts on the phone and the SIM with a pencil eraser.

nokia 1110 mic fault

i got a sony ericson k550i the display reads insert sim or view demo but simcard is in the phone. Why did this happen

Hey i'm having the same problem with mine, u prob got it sorted by now but i found that it is because my sim card is so old, tested it with my friends brand new sim card and works fine, 
did you solve the problem?