[iMore Question]

My iPhone kept asking for a password when I tried to turn iMessage on. I then looked online for assistance and reset the network connections. Then I tried to go to iCloud to accept the terms and conditions, but it says unable to connect to server.

[Tartarus]

Hi, welcome to iMore.

Wait a few minutes (or hours) and try again. If not successful, try turning of wifi and give it a go again.
It could be a glitch or some other issue.

If still not successful, reboot your iPhone.

In the worst case scenario you could contact  support to have it solved.

[iOS Gravity]

Try a different wifi network or use cellular data in order to rule out a problem with a specific network.