How to get ios on my iphone?

I have the first iphone (lame i know) and i need to get ios on it.everywhere i go it shows how to update ios but i don't even have the origanal one on here.someone please help!

Because you have the original iPhone, I don't believe you're able to download or install the most current version of iOS, which is version 6.1.3 (for the iPhone 3Gs, 4, 4S and certain iPad models) or 6.1.4 for the iPhone 5.

However, you may be able to update your iPhone to the most current version available for the device (version 3.1.3 is the last version supported by the original iPhone, I believe) by plugging it into your computer, launching iTunes, and checking to see whether or not there are any updates available for your iPhone's firmware.

Also, according to the Wikipedia article about the 1st generation iPhone below, there are also other, third-party, operating systems available for the original iPhone, which you may want to look into, if you're interested.

http://en.wikipedia.org/...eneration)

Additionally, like Agabani suggested, you may have better luck posting this question in the "Cell Phones & Plans" subsection of the "Consumer Electronics" section, where you may be able to get a better answer to this question.

Best of luck and I hope I helped you!