Why can't I save the detains after manually inputting the APN details?

[Windows Central Question]

My provider (Vodafone UK) does not support this phone. On entering the APN details manually, I am unable to save them. Is it my phone's fault or is it the software? Can anybody help please

 

[TechFreak1]

A little more information would be helpful,

1. such as which phone?
2. which operating system?

Please join and provide more information in this thread.