Will I need some sort of voltage changer for USA?

toniq

We planned to take old unlocked mobiles to use whilst in Florida but I am concerned we wont be able to charge them over there because of voltage, the idea was to get a cheap USA sim to keep in contact whilst we done the parks.

But if chargers wont be able to charge the phones then we can't, I also planned to take my normal iphone and switch off all internet so if kennels or mother needed me they could still contact me as normal, though hopefully wouldn't need to.

Many thanks for any help.

malkie76

I've never had any issues with my iPhone in the US - just use my UK charger and an adaptor plug.
Same should apply for other mobiles too. In my experience I've had no issue with electrical items - I believe when they are manufacturered they are designed to work in any country to keep costs low (rather than have to make a UK one, a European one, a US one etc etc etc.

vivatifosi

Not necessarily, it depends on the phone. I have had several that just charge up more slowly in the US, one that I can switch to a US or USB charger, and yet another one that doesn't charge at all using my uk charger over there. Best thing to do is have a look online using the model no. To be fair the one that I've had problems with is the oldest/least sophisticated.

jammin_2

For charging: Depends on the phones and chargers OP. Check on the charger, if it says 110-230 volts (give or take) then it will work in the US (just use a simple travel adapter to convert the plug).

For SIM cards: Pay as you go in the US is not cheap. You almost always pay for incoming calls and incoming text messages unless you pay extra not to. If you really want to get US SIM cards though, I recommend getting an AT&T Go Phone SIM card from eBay. Link. Get it delivered to you here so you can take it with you when you go. You can register it online from here and note down your phone number. SIM cards are difficult to get within the US, without being a resident and having a social security number.

For the phones: Needs to operate on GSM 850mhz, GSM 1900mhz, or UMTS (3G) in order to work in the US.