Do I need a nano sim?

[Bindoner]

I'm upgrading my monthly plan, and keeping my old iPhone 7+, do I need a nano sim, or can I keep whatever I've already got?

[jonsie]

Keep the same sim

The website will ask if you want a new sim

Best advice to stop any incompetency by O2 is to opt to keep your current sim, just choose that when upgrading or changing tariff

[Bambino · Accepted solution]

@Bindoner Your phone already has a nano sim, so if all you're doing is upgrading your plan you don't need to change sims.