On my S10+ on 3 network UK I press the banner on the beta in member's app and it gives me a error please try again later message.
Is this happening to everyone? I would like to enter for the UK S10 beta and for 4 days it's giving me the error message.
to join the OneUI 2 with Android 10 beta programme, you will need an open network version of the Galaxy S10 family (S10e, S10, S10+. S10 5G), be using a UK SIM and have a Samsung Account. That means that if the phone is locked to a particular network you won't be eligible for this.
As of 2014, all phones from Three are totally unlocked and should be able to access the beta as I did last time on my previous Three phone, see extract from their website