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Using Mobile phone in the USA

Rob4T
Level 1: Joiner
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I`ve given my old phone to my girlfriend in the USA. she`s put a Horizon sim card in it and apparently it does`nt work. Do UK phones only work on networks in the UK. I have used the phone in the US while I was on holiday last year while I was on 02. It connected to AT&T

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Cleoriff
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@Rob4T 

O2 phones work in the US.  However if it's an old phone, it may be locked to O2.

See if she can get it unlocked whilst there (via an outlet which unlocks phones) and then I would ask her to try a local AT&T sim.

 

Edited to add unlock advice.

Veritas Numquam Perit

Girl in a jacket

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Cleoriff
Level 94: Supreme
  • 126734 Posts
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Registered:

@Rob4T 

O2 phones work in the US.  However if it's an old phone, it may be locked to O2.

See if she can get it unlocked whilst there (via an outlet which unlocks phones) and then I would ask her to try a local AT&T sim.

 

Edited to add unlock advice.

Veritas Numquam Perit

Girl in a jacket
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madasaf1sh
Level 77: Grand Master
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@Rob4T

Did you mean Verizon?

If so that is one of the networks that might not work, as it may be trying to connect to the CDMA network.

The iPhone for o2 (and in that respect AT&T and T-Mobile) does not support CDMA and will not work Verizon Wireless, the same applies to Android Phones as well.

and to add

"One important thing to note about Verizon Wireless is that many phones are built specifically for the carrier, including its 4G LTE bands. In other words, the common case is that you will not be able to use an AT&T device on Verizon's 4G LTE network."

 

(edited to add text)

--
iPhone 16 Pro Max - o2 and Spusu
Xperia 1V - Spusu

--
This is not customer services and we dont have access to your account
I do not work for o2 or any VMo2 /Telefonica/Liberty Global Company
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