[Jaymoss]

Loads of good deals out there if you own a sim free phone. I would not necessarily look at Argos though. What phone are you looking at? I currently am a big fan of Xiaomi devices. Look at the Poco X3 NFC the Poco X3 Pro and the Redmi Note 10 Pro. Very high spec for the price ( beats budgets Samsungs and so on)

I got a deal off VM for a totally free sim for 18 months (unlimited minutes text and 5GB data) but pretty much all providers will offer you a deal if you tell them you are going sim free and intend to switch if they do not

Smarty have good offers if you have good signal from 3 in your area
Guffgaff are also good if you cannot get a good deal from your provider and you can always take your number anywhere