I’m with Three - not sure how their phone-included contract prices compare, as I have a SIM-only contract, but I like Three for their Go Roam service.
With Go Roam, I can use the included data in my plan for free in 71 countries, plus calls and texts to UK numbers are also free in those countries. Calls/texts to foreign numbers are still extra though. So, when I go to the US, for example, I can just use the 4G data on my phone for no extra charge.
Are you planning to get the iPhone SE on contract, or buy the phone and then get a SIM-only contract?
I recently got an iPhone 8 (just before the new SE was released, or I would have gone for the SE), and I ordered it on Amazon and used £100 Amazon vouchers towards it. So, I just pay £13/month for a SIM-only contract (unlimited calls/texts plus 12GB data). With the vouchers, it worked out a good £200 cheaper overall than getting the phone on contract.
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