I decided upon MightyText as I didn't want another phone number as some of the other apps provide. MightyText syncs my phone and the K1 within seconds. If I get a text to the phone, I get a notification on the tab within a second or two. Same happens if I send a text from the tablet, I get a notification on the phone again within a second or two. I realize that the phone is using it's cellular radio to send the text. Phone is a rooted LG Optimus G Pro running KK.
Here's where it gets strange! If I turn off WiFi and BT on the phone, when I write a text on the tablet and hit send, my phone receives and sends the text. WiFi and BT are still off. I looked to see if the app was somehow turning the radios on, on the phone, but it looks like they are staying off (unless they are coming on for a fraction of a second). I'm trying to figure out how the tablet is communicating with the phone if the radios are turned off. Also, the app has a phone icon. if I hit the phone icon on the tablet app, the phone makes a call to whoever I happened to be texting. I cannot talk through the tablet (I don't think), but the call does go through. I'm unsure what the functionality of this item is...why would I want the tablet to initiate a phone call when I cannot talk through the tablet?