Hey @drhapgood_925, welcome to Three Community. That's a strange issue, let's see what we can figure out.
Firstly, what device are you using? If it's a phone, you should find the option to reset Network settings under 'Reset' or 'Network' options. Give that a try and let us know if it helps.
How long as has this been a problem, and is it happening in one particular area? If so, have you had a check of the postcode in our network status checker?
Are you getting a good 5G connection, and then manually switching over to 4G, at which point you can't access the internet?
Let us know more, and we'll do all we can to help!
Mod tip! The author of a post can hit 'Accept as Solution', to highlight a reply that helped solved their query.
