Q: After earsing all content and settings from my iphone sim card not valid any help please ???

Follow the instructions here >  If you see 'No SIM' alert on iPhone

More than likely, your phone was hacked or jailbroken to illegally unlock it previously. Erasing the device has also erased the 'hack'. Your phone has been re-locked to the original carrier. Either sign up for service with that carrier, or find out what their policy is and their requirements for a legitimate unlock.

Note that a hacked or jailbroken phone may not be able to process a legitimate unlock. It may not even be able to activate with a SIM from the original carrier any more.

Where did you get the phone? Was it hacked or jailbroken to unlock it from the original carrier?

What does it say in Settings>General>About>Model?

Where EXACTLY did you buy it? You almost certainly purchased a gray market phone that was hacked to unlock it originally. Here's the test. Did the phone have FaceTime?

Then it's a gray market phone that was almost certainly hacked to unlock it. FaceTime is banned by law in the UAE and has been permanently removed from all iPhones sold legally in that country.

It is more than likely toast. Google "iPhone DFU Mode". Do a DFU mode restore. If that doesn't fix it, recycle it responsibly and buy a new phone.