The Square card reader is a device that attaches to the headphone jack on the iPhone. When connected to the iPhone 4 it actually hurt the reception due to metal on the bottom of the reader contacting with the metal antenna of the iPhone 4. It seems that in some cases, signal could be affected by this.
Square has now launched a new model that gets rid of the metal contact at the top of the 3.5mm jack which in turn, prevents contact being made with the metal surrounding of the antenna.
Square will be sending out the new model to those who have made a recent transaction with the system.
Information from the company co-founder also reveals that the new reader is more accurate when cards are swiped across it.
Via: SlashGear
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