Using US Android Phone in the UK

If your phone is unlocked, the cheaper option would be to buy a local SIM and use that. The place where you buy the SIM will explain and set it up for you. You just need to make sure the phone is unlocked.

Liz, If you're only planning to make a limited number of calls and texts, it may be easier just to roam with AT&T. Speak to their CS rep's for information on "travel packs" they offer, which will reduce the costs. If you choose that route, you MUST disable cellular data as data roaming charges can be HUGE! One disadvantage of roaming with AT&T will be that you'll still receive calls from anyone at home that dials your number. Those calls are especially annoying when they happen in the wee hours of the morning, because someone didn't bother to check the time difference. The other (and cheaper) option would be to buy a PAYG SIM card when you arrive in the U.K. You would have a U.K number and prices according to which calling plan you choose. In order to use a U.K. SIM, your phone MUST BE UNLOCKED, so you might want to speak to AT&T to determine whether they're willing to unlock your phone for a reasonable price. As you'd be on a PAYG plan, you'd have to top-up the minutes in your account from time-to-time. Happy travels!

Well I took my trip and found out that my US phone was locked but for approximately $35 I was able to buy a cheap phone in the UK with enough phone and text to last me a week, which is cheaper than adding international calling to a US contract.

Liz,

Glad to hear that everything worked out. Hopefully you had a nice holiday.