How to install iOS7
JULY 08, 2013
Here is a quick guide of how to install iOS7.
STEP 1. Download iOS7 beta from iOS Dev Center.
Depending on your mobile carrier, choose a correct model (e.g. Model A1428 for AT&T or A1429 for Verizon).
STEP 2. Execute a dmg file.
Once downloaded, execute a dmg file. It will unpack an ipsw file.
STEP 3. Install iOS7 via iTunes.
Connect your iOS device to Mac or PC and open iTunes. In iOS device summary page, find a button "Check for Update". Before clicking it, hold down an ALT key on Mac (or SHIFT key on Windows), then click. Choose the ipsw file you unpacked.