| | Re: OTA download via web for OS 4.5?
If you are trying to reload the device OS, the over the air (OTA) option will only be present if that function is supported by your carrier and if they have released an updated OS version for your device beyond what is currently installed on the device.
Otherwise, you will not be able to load the device OS over the air. And if your USB port is not functional, then you are out of luck unless it can be repaired (and you have it repaired)>
"Reformat" is really not the correct terminology.