Hipipooo J5+ Waterproof Dustproof Shakeproof Mini Rest-Pocket 2.45" Smartphone with Android 5.1 3G Unlocked Mobile Phone MT6580M Quad-Core,Dual SIM Card Slot(Yellow)

I bought this Hipipooo J5+ Android phone for a bike computer replacing an obsolete Sony Ericsson Xperia Active. I use  CycleBike Smart  Amazon app for navigation and recording Bluetooth sensors like a heart-rate monitor, speed & cadence. The Hipipooo J5+ seems well-built, rugged and should survive adverse weather on the bike. It is compact enough to fit on the bicycle stem, shown in the photo. The GPS only senses Navstar satellites, not Glonass, but the GPS accuracy is good as seen in the images of the track. The battery life is good when using CycleBike Smart, even for long rides. The Android 5.1 operating system hasn't crashed, there is plenty of memory in the phone, and the processor is very fast. The keyboard is too small to use the phone for texting or email, but is adequate for use as a bike computer with the CycleBike Smart app.

The ONLY reason I bought this was to use as a music device in the gym. I would give it 5 stars, except the headphone jack hole won't hold my headphone plug snugly. It frequently slips out of the hole, and I have to plug it back in a turn it a little bit, and restart my music. And battery life could be better. I haven't used it much because I usually do CrossFit, which is a group fitness class. I returned it.

I loved this unit but had to return it because the headphone jack did not work well with my headphones. I noticed that another reviewer had the same issue.

The size was what I was looking for,but the incoming calls were very hard to hear. I purchased two and returned both.

Great product. Small as a credit card. Manny languages for menu and international version unlocked. The vibration is excellent. For kids I belive is excellent.

This phone would not work with AT&T so I had to returned it. Its a shame, because I really like the size. It fit my watch pocket.