[Theo_andravida]

I have taken a month ago Lumia cyan on my Lumia phone. I heard a rumor about update 2 coming 8th October and I wondered if it is wise to enroll to the developer preview program to get update 1 with folders which I like a lot? Had anyone heard when update 1 is coming to normal users? What are the rules for enrolling in the developer preview program and will I lose guaranty or something?

[N_LaRUE]

Here's everything you need to know about the developers preview - All you need to know about the Windows Phone 8.1 'Preview for Developers' | Windows Phone Central

As for updates after WP8.1, we have absolutely no idea. Considering not everyone has WP8.1 yet, probably a little while still.

If you have issues with your phone you can always convert it back using the Nokia Software Recovery Tool prior to sending it it.

FAQ - FAQ - How can I recover/reset/restore my phone software? - Nokia - UK

That's of course if you have any issues before your warranty runs out. Warranty here is only one year.