Downloaded iOS 10 beta 3

Hi, hope someone can help with this..I have tried to download iOS10 beta 3 twice now and both time I am being told I don't have enough storage when the download is 1.7gb and I have over 2gb of storage on my phone. Is there a minimum storage I need available or any other options I have to help with this?

update with itunes instead of ota.

I have tried that before and was unable to do the update via itunes. Is there anywhere I can read up on the process to do so?

Downloaded iOS 10 beta 3
 
 
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