My iphone isnt reading my sim card, it says "no sim card installed, insert a valid sim with no pin lock to activate iphone" when i try to slide to unlock it it takes me to emergency calls, please help

Verify the sim card in another phone, probably you have a damaged sim card .

Is the iPhone locked to a particular network carrier? Maybe the SIM card you are using is for another carrier.

e.g. iPhone locked to O2 (Verizon, AT&T, Vodaphone) but SIM is for T-Mobile or 3.

No Sim Card Installed Insert a valid Sim with no pin lock

That Should Work I Am Not 100% Understanding What You MEan But.
If You Put An Actiive Sim Card For AT&T Or Verizon,
It Should Work.

it means only that your phone sim is not compatible :D try other sim

Read this tip to know how:
http://www.fixya.com/support/r4701614-replace_iphone_sim_card

For more iPhone / iPod touch tips, click here.

...

you need to insert your sim card in the top with the sim eject tool (found in quick-start guide i believe) and connect to itunes and set up, name etc. now sync and it should work
Regards

What You gotta do is...1. Google Blackra1n. 2. download it!! 3.open the blackra1n. 4. Click make it rain 5. wait for iphone to reboot. 6. Enjoy your re-hacked iphone.
Be sure to do this process with your Invalid sim card.
What happened?
When you updated your iphone the hack was un-done. Apple also has a software that senses when you are updating a hacked iphone. The software turns your iphone into a nice brick.
This should work!!!

what sim card are you trying to use after the restore in itunes and also when you finished the restore in itunes did your iphone come up with a message saying iphone activated?

go here click here and tell him what has happend this chap is a god with iphones he actually makes his own software etc for iphones.