It's all a problem bluetooth related, after android 4.2 bluetooth protocol of android phones changed, and it's the cause of al these problems. It can be solved modifying bluetooth in your android phone, but it's not an easy task:


https://forum.xda-developers.com/and...tooth-t3045523


Other option is to replace the ulf module using a gen13 release, but they are quite hard to find, and expensive....


Problem also happens with IOS newer than 6 release, but i've neved had iphones so cant say nothing for sure abot it...