@tumababa,  i have an iphone4 (5.0.1 (9A405)} with this MC610LL and it worked for just 1 day, thereafter it was 'no sim card installed' on powering up, what really happened on the day it worked? if it couldnt work at all, can you get someone that will buy it from me. I will mail over.
what is d modem firmware? capacity? is it chipped?
Thanks for yr prompt response;
Pls bear with me.i'm a rookie proper.
details of the iphone are:
iPhone4=== capacity 28.5GB=== Version: 5.0.1 (9A405)==== Model:MC610LL ===Modem Firmware:02.10.04
it worked for just 1 day and "no SIM" appeared  since then it has permanently been on "No sim card installed" the moment i powered it up.
I had to reset the settings but nothing happened, could the reset have any effect? pls help out.  i'll really appreciate a detailed explanation as i'm totally lost. I'm using Etisalat data card which has the best service in this area.

I think u need a full restoration of your iPhone and you have to try a new gevey sIm card, resetting iPhone settings ain't good better call tuma or Suntemi now