If you are using the original iOS smartphone, then you must purchase a new version of iOS smartphone. You will not be able to repair your original iOS smartphone in the future because it will get obsolete status within few months. According to 9to5Mac, they have received a leaked internal documentation, which has confirmed that the original iOS smartphone will get obsolete status on June 11th. They have claimed that this smartphone will get vintage status only in the United States.
You should note that this device was launched in 2007. You will not be able to repair it after June 11th. The time has finally come to change your old smartphone. If a device is discontinued for over 5 years and it is repairable, then it is called as vintage device. If a device is discontinued for over 5 years and it is not repairable, then it is called as obsolete device. This is the difference between obsolete device and vintage device. You should note that the original iPhone is not the only Apple device that is going to get obsolete status in June. Several other Apple devices are also going to get obsolete status in June. The name of the devices are late-2007 13-inch MacBook, 2.4GHz 17-inch MacBook Pro, mid-2007 24-inch iMac, mid-2007 20-inch iMac, Mac Pro, late-2004 Xserve RAID SFP, late-2006 Xserve, 2.4GHz 15-inch MacBook Pro and 2.2GHz 15-inch MacBook Pro.
If you are using any one of the above devices, then you will not be able to repair it after June 11th. You must replace your old device. You can purchase the current generation iOS smartphone from Apple online store. You have to pay $199 to buy 16GB version of iPhone 5, $299 to buy 32GB version of iPhone 5 and you have to pay $399 to buy 64GB version of iPhone 5 with a two-year contract.