install iOS7 on your iPhone (with no iOS developer account)

iOS7 is still open to iOS developers only by right. However, if you don’t have iOS developer account yet really want to give it a try, here is a manner:

• Back up your iPhone

to keep your data safe, always back up your iPhone before doing risky stuff

• Download iOS7 firmware

Do a google search with keyword ios7 ipsw download,you are able to find lots download links. Select the correct version for your device.

please take note iPhone 5 got 2 version, a1428 and a1429, please check your original iPhone 5 box to confirm which version it is

• Let’s get Started

connect your iPhone to your Mac/PC, open iTunes.

 Mac user: Option + Check for Update
 PC user: Shift + Check for Update
 

to select the *ipsw file you just downloaded

the latest iOS version is iOS7 beta 3 when writing this post

Click Yes and just continue through the update, if everything goes well you should be able to see iOS7 at the end

• What to do if got stuck
  Sometime, you might be the unlucky one get stuck with your iPhone, it became either dead or stuck, try following method to get it back to live.

Soft reset
Press and hold sleep button together with Home button

Recovery Mode
power off your iPhone
connect to Mac/PC
Press home button all the way till you see recovery mode image, open itunes and click restore to restore a working version for you

Have Fun!