Can I hail as from different cell phone using phone cards?
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Yes, if you enjoy a phone card you use it from any phone you want (you don't have to hail as fromt he same phone everytime).
One thing to remember is that if you telephone call using a cell phone, you will still have to payment for the normal usage charges (ie: if you hail as in the daytime, you are using your daytime minutes, etc). Your long distance charges are covered by the phone card but not your conventional cell phone charges.