In 2022 the mobile phone law was amended so as to make just about any use of a mobile phone whilst driving an offence. Prior to that the police had to prove that it was being used for "interactive communication."
The amendment provided a useful list (which is not exhaustive) of activities which are considered using:
“(c)in paragraphs (1) to (3) the word “using” includes the following—
(i)illuminating the screen;
(ii)checking the time;
(iii)checking notifications;
(iv)unlocking the device;
(v)making, receiving, or rejecting a telephone or internet based call;
(vi)sending, receiving or uploading oral or written content;
(vii)sending, receiving or uploading a photo or video;
(viii)utilising camera, video, or sound recording functionality;
(ix)drafting any text;
(x)accessing any stored data such as documents, books, audio files, photos, videos, films, playlists, notes or messages;
(xi)accessing an application;
(xii)accessing the internet.”.
You will note Nos (i) and (iv) which I have highlighted.
Six points is the minimum for a mobile phone offence. If you see six points imposed (either by accepting a fixed penalty or as a result of a court hearing) the DVLA will write to you revoking your licence. There is no appeal against this - it is enshrined in law and it must be done.
As soon as your licence is revoked you can apply for a new one and begin driving as a provisional licence holder. You will have to take your test (both parts) again.