Length of award and use of mobile phones (Pip)

If you suffer from a lifelong condition in which it has been said by a consultant I'm going to have to adjust to it for the rest of my days, can you challenge the length of an award if, for example, you have received an award for three or four years?

Being able to use a mobile phone and reading texts has recently been used to deny me the points I should have got. Is there any specific guidelines with regard to their use?
Thank you.

BIS wrote: Hi Ethan

There are no specific guidelines on how they view a claimant using a phone and reading texts. They are likely to use that knowledge to judge the level of someone's reading and cognitive abilities.

BIS

If I could show I am only able to use a phone in certain conditions and that I cannot do so reliably, safely and to a repeatable standard as reasonably required- would this negate their argument? It wouldn't change the fact that I had issues using it. I have a brain disease so the settings of the phone have been adapted to make the receiving of calls for emergency purposes a priority. There is an app on the phone that once it detects a fall automatically rings the wife. Tbh it's not even my phone it has been loaned for emergency use only.