My sim not working on phone so please tell me how I solve this problem

See these Apple articles below:

If you see No Service or Searching on your iPhone or iPad

If you see No Service or Searching on your iPhone or iPad - Apple Support 

Manually update your carrier settings on your iPhone or iPad

Manually update your carrier settings on your iPhone or iPad - Apple Support

Update your network provider settings manually on your iPhone or iPad

Update your network provider settings manually on your iPhone or iPad – Apple Support (UK)

How to unlock your iPhone for use with a different carrier

How to unlock your iPhone for use with a different carrier - Apple Support

-> Apple can't unlock your iPhone for use with a different carrier. Only your carrier can unlock your iPhone.

You need to contact your Carrier.

If you can't activate your iPhone

If you can't activate your iPhone or iPad (Wi-Fi + Cellular) - Apple Support

If your SIM card does not work, then contact your Carrier and get a new one. If your iPhone cannot read your SIM card, check if it is Carrier-locked to another Carrier.

You can read more here:

How to unlock your iPhone for use with a different carrier - Apple Support

Maybe your iPhone has a defect. In that case, contact an Apple Authorized Service Provider.

iPhone Repair - Official Apple Support

Alirazajutt ~ Does your iPhone 5s still have its original battery?

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