Mike Sorrentino is a Senior Editor for Mobile, covering phones, texting apps and smartwatches -- obsessing about how we can make the most of them. Mike also keeps an eye out on the movie and toy ...

If you receive a PDF or other digital file that requires your signature, you can easily do so using your phone. Whether you use an iPhone or an Android phone, both include built-in options for adding ...

Free software on your phone or tablet lets you scan, create, edit, annotate and even sign digitized documents on the go.

What do you do if you receive a PDF document by e-mail and need to sign it and send it back? You probably print it out, sign it, and then scan it again before e-mailing it. It’s a tedious process and ...

Firstly, you need your signature in digital form, preferably using a tablet PC with pen input. If you don’t have such a device to hand, sign on a white sheet of paper and take a photo of your ...