New answers tagged western-europe
In my experience, your brother may write a letter that he's going to provide for you and your sister during the trip, and that, together with his bank statement, ought to be enough. If he can show enough money in his bank statement, of course. You can clarify this with the embassy. This assumes that you're going to travel as a group.
T-Mobile in the US offers free data and 20c/min calls in most countries, but you need postpaid account, i.e. have US SSN or ITIN and pass credit check.
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