What type of SIM card

[John27]

I recently got the iPhone 15 pro max, however I can't use a nano sim in the phone. Any ideas please 

[daveNOS]

@John27 If you have a UK version of the phone then a nano sim should work , what is happening when you try to use one?

[John27]

The nano sim from iPhone 13 Pro is a tight fit and won't work 

[daveNOS]

@John27 If the physical sim isn't working then you could convert it to an esim https://www.sky.com/help/articles/esim-sky-mobile

[PandJ2020]

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@John27 wrote:

The nano sim from iPhone 13 Pro is a tight fit and won't work 

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They are designed to fit exactly in the tray and are 'tight'.  There's no reason why it won't work though.

Order a replacement SIM if you wish...