I love my FOBO TPMS! However - when I first got it, my Android 8.00 phone would initially read both sensors but would then only update the front sensor regularly. I messed around with settings, switching positions, etc. and such for a few days. The problem followed the sensor, so FOBO very graciously sent me a replacement sensor. The problem persisted with the new sensor. I finally dragged out an old Android 4.something phone which had no SIMM card, deleted all the software from it and installed the FOBO app. Problem solved. I just toss the old phone in one of the fairing compartments and check the tires whenever I stop for gas. My conclusion: the sensors are great but the phone app is twitchy and other apps probably conflict with it. As a bonus, if I ever lose my new cell phone, the old phone without the SIMM card will work for a 911 call.