Wasn't there supposed to be an app for backuping and/or restoring the Windows Phone preview on your device?
I'm waiting for that before i update anything
Not sure if it's an app, or if there is a "roll back" feature within Windows 10 for Phones.
The following is from the blog announcing it. This is why the particular model phones were selected for the first build for phones.
The most important thing for us is that we want to make sure that anyone who tries this early preview has a way to get back to their prior OS if something goes wrong. So we’re only supporting phones for the preview that have a recovery image available. We created a new tool called the Windows Phone Recovery Tool that will restore that image if necessary.
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