Faulty iPhone 17plus

[D1ean]

So annoyed with sky had problems straight away last September and they have ignored all the phone problems it's had sims as that seems to be the thing that cures everything they will not replace my phone and they are stalling as the warranty runs out September after 26years with sky I am going they just don't want to change it 

[caesarome]

@D1ean 

What is the fault with the iphone ?

Have you got a quote from both Apple and Sky for a fix and then gone with the cheapest ?

[twilight+princess]

Do you have AppleCare? If yes then I'd take the phone to a Genius Bar to get their option & have the phone fixed.
Otherwise can you say what problems you're experiencing? 
If Sky believe it is a sim problem then have you tried a non Sky/O2 SIM card to rule that out &/or tried the Sky/O2 sim in another phone to rule that out?