My airtel sim card had balance but when I make a call it asks me to recharge my sim card?

or:My airtel sim card had balance but when I make a call it asks me to recharge my sim card?or:You can ask help to the operator of your airtel sim ca

or:My airtel sim card had balance but when I make a call it asks me to recharge my sim card?

or:You can ask help to the operator of your airtel sim card.

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