Q: i have i iphone 5 sprint but i cant use in my country how can factory unlock.

Hello there, Parbati.

Unlocking can only be performed by your Carrier (Sprint). Apple has a good resource page that should help you find out if that option is available for your area:

iPhone: About unlocking

http://support.apple.com/kb/HT5014

The following is great information to use as a guideline:

Follow these instructions to unlock your iPhone:

1. Check if your carrier offers unlocking. Only your carrier can unlock your iPhone.
2. Contact your carrier and request an unlock.
   • You may need to meet certain requirements to qualify for unlocking. This may take up to seven days.
3. Once you receive confirmation that your iPhone unlock has been processed, back up your iPhone.
4. Erase the contents of your iPhone.
5. Complete the setup assistant and restore your backup.

Thanks for reaching out to Apple Support Communities for answers to your question.

Cheers,

Pedro D.