I need opinions on smartwatches that have the features listed below from as many people as possible, preferbly people who currently own or have owned the watches that they are recomending. 

Must have these features: 

3g cell connectivity (preferably with SIM but not a must) 
GPS 
Physical buttons 
Long battery life both between charges and overall 
At least water resistant but preferably waterproof 
Sturdy build i. e. won't fall off when being worn with highly rigorous activity 

These features are optional but prefered: 
Camera 
Speaker 
Microphone 

Any other features don’t make any difference to me if the watch has them or not. 

Thanks in advance for your answers.

Recently AllCall W1 seems very hot, 3G independent calling with MTK6580, 2GB RAM and 16GB ROM. With Pedometer and heart rate monitor., with the price $89.99, seems not bad, if you have other better recommendation for me? Thanks!

Some pictures form internet

Galaxy Gear S3 rip-off...

How much that one?

MarkWayne89:
Galaxy Gear S3 rip-off...