Q: I’m using a Square credit card reader that attaches to my smartphone, but I’m finding that the transactions don’t always go through properly. Is there a certain smartphone or cellular service ...

The 5 Best Credit Card Readers for Android (Recommended By Experts) Your email has been sent Android devices have made significant technological advancements in recent years. Like iPhones, they can ...

We reported on the dongle-based audio signal credit card reader for iPhone and other connected mobile devices a short while ago, which has been pioneered by Twitter creator Jack Dorsey. Square uses a ...