UK SIM for iPhone 6Plus
 

Headed back to London in a couple of weeks. I've used 3 in the past because it was inexpensive and the most compatible with my old Samsung Mega. The service, even in London, wasn't great. I now have an unlocked iPhone 6 Plus with all bands so can explore other options.

I'll be using the phone for data, local calls and calls back to the states.

Any suggestions would be appreciated.

Thanks.

Order a free giffgaff SIM card from my referral link, and you will receive £5 free credit. The SIM card is all four sizes in one, whereby you simply break out the size you need, so it will fit your iPhone 6 Plus.

Giffgaff has a range of goodybags, similar to monthly plans, but prepaid.

@NFH, Thank you but will they ship to the US?

No, but you can enter the address of your hotel or other accommodation so that it's waiting for you when you arrive.