how to register on galaxy beta program on galaxy s8 in india?

low conductivity on airtel 4g sim its a big error from past 3 months

where is bixby update 

is it safe to change csc for bixby voice?

touchwiz home update issue with home screen and app drawer icons.after update m unable to get option when i long press on any icon on home or app drawer.any one face same issue? i got some options when i uninstalled latest version to back old versi...