Mobile Phone advice please from hot uk deal members

Hi Guys ,
I’m looking for some help/advice/recommendations please, about mobile phone contract upgrades - I’m basically wanting to upgrade my old iPhone Xr (which is approx 5 years old) which has started to slow down and also has now got issues with lines on the screen.

Currently I am on Sim only , I’m with Vodafone.
I believe I currently get 120gb data, unlimited calls and texts and I currently pay £26 a month each month for this - for info I never actually go over my data allowance so the 120gb of data is sufficient for me.
Vodafone have called me yesterday to say if I “lock in with them for 2 years” on sim only - I can have unlimited data , unlimited calls and texts for £23 a month - so that would be a saving of £3 a month with a much higher data allowance.

So here’s the bit I want help with please....

I’m happy to pay a bit more - say £35/£40 a month, if this can secure me a newer iPhone (as my handset needs upgrading) with a contract tariff similar to the 120 gb data with calls and texts plan that i currently have.

Please can anyone recommend a deal/provider - where I might be able to get say an iPhone 12 or even iPhone 13 for £35/£40 a month or is that not being realistic?

Thanks Nick