there is no SIM card installed in the iphone you are attempting to activate
Before do any update the new version, my iphone 3Gs is working well.
after update to Version 4.3.3 the iphone3Gs totally can't be use & always show NO SIM.
I do check from Malaysia Maxis Operater, the iphone3Gs is from UK O2.
And it need valid SIM to activate iPhone, kindly advise any Malaysia sim card can be activate!
Thank you
SsAng
iPhone 3GS