Thanks for all of your contributions and feedback today.
"Server Error. Try again later."
This may be indicative that your phone is not eligible for the Beta Programme as it is only available to open network variants (BTU/XEU) of UK S10 family devices running UK SIM cards.
Am I on an open variant of the phone?
Samsung's opinion of rooting, custom ROMs or flash unlocking
We certainly don't recommend anyone installing a custom ROM or 'flash unlocking' their phone and only ever use official software released OTA (over the air) or via Smart Switch for PC/Mac. Non-official versions of the software are untested and may open you up to security risks and may also result in damage to your device that will not be covered by your manufacturer's warranty.
@Kay9 - We'd be happy to check this for you, please share the information in Service provider SW version in a screenshot or copying and pasting the full details. This can be accessed in: Settings > About Phone > Software Information > Service provider SW version