calling cards call the us from France on trip

What calling card (phone card) can I buy in the US so I can call the US from France on my Trip?

I saw a Sprint International Phone Card that said things about calling from the U.S. to other countries. I haven’t seen any cards that say anything about calling from a country to the U.S.

Do I need to wait until I get to the country to get the phone card? Or where should I go to get one in this country? Where do I get one in France if I get one there, I’ll be with a group and may not be stopping at many convenience stores.

how to call the US from UK

Follow these steps to make your call
Steps:
1. Figure out what time it is in the United Kingdom. The UK is 5 hours ahead of the US Eastern time zone, so adjust based on your US time zone. Except when the UK is 4 hours ahead, as it is between the time US daylight saving time begins, and the time, several weeks later, when UK daylight saving time begins.
2. Dial 011, which is the international access code.
3. Dial 44, which is the country code for the United Kingdom.
4. Dial the specific city code where you are calling. Some of the major cities include: Aberdeen: 1224, Birmingham: 121, Bristol: 117, Exeter: 1392, Glasgow: 141, Liverpool: 151, London (inner): 207, London (outer): 208, Manchester: 161, Plymouth: 1752, Swansea: 1792
5. Dial the rest of the telephone number.
Tips:
o If the phone number which you are trying to reach has a zero between the country code and the local code (e.g. +44 (0)141 XXX XXXX) do not dial the zero. Simply dial 011.44.141.XXX.XXXX
o If you are unable to connect your call, dial 00 and ask the international operator to help you place the call.
o Do not dial “1″ first as you would making a long distance call in the US. If you are calling from a phone that requires you to dial “9″ first, your sequence would be 9.011.44.XXX.XXX.XXXX
Warnings
International calls can be very expensive. To avoid unnecessary fees, place calls during the evening or on weekends. You may also want to check out prepaid International calling cards as the per-minute fees are generally much lower than traditional long distance.
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Why should I use a calling card?

Some one knows little about phone card or they know nothing about calling card.Calling Card and international calling cards is very important in our life.Choose a right calling card,save a lot of money.

· They are often much cheaper than long distance providers.
· They are cheaper than your local phone company.
· They are cheaper than collect calls and operator assisted calls.
· You can budget your long distance calling costs.

There are no monthly bills, and no detailed statements. Rather, you simply pay for the calling time in advance and reduce the prepaid balance as you make calls.