Using lagacy prepaid phone internationally?


    I have used a pre-paid T-Mobile phone for many years. If I add enough money to the account and then travel internationally, can my phone be used for quick calls like getting an Uber - in the 140 countries that T-Mobile has agreements? I will need only a few minutes at a time even if per minute cost is higher, 3-4 times. Not worth it for me to have more expensive plan,

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