Is Updating to ios 7 beta 2 from beta 1 without udid registered via OTA is safe?

I have iphone 4 i installed ios 7 beta 1 from ipsw file via itunes (shift+update) button and now my software tab i showing beta 2 update. But i'm not developer and i did'nt even registered my udid.
so updating via OTA will be risky?
will my iphone brick?
what to do?
will it ask for developer account after update?

Added (1). People who already attempted this please tell me is it safe?

It are OK.

It's not safe! Seriously, running the betas without a UDID registration is just asking for trouble, since Apple could brick your phone at any time. Just register your UDID with a site like http://www.instantudid.com/. They'll do it instantly and it's just $5 to make sure your phone doesn't get disabled.

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