@hammadharoon ;
The reader can only be connected to One device at a time. If more than 1 Phone is in range your reader may still be connected to the other phone. You need to reset the Reader and Forget your Reader on the other phones that might be in range. This is more of a saftey feature that only one device can connect through Bluetooth to the reader. Try connecting the Reader to 1 phone to use for your Square customers and see if that helps. The other alternative is get a dedicated tablet or Phone for business using Square.
Keith
Owner
Pocono Candle
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