Android and BLE connectivity issues

[brinehart]

Hello,

We are currently using a Raytac SoM that has nRF51822 SoC with Adafruit UART firmware. We are running into two different scenarios BLE connectivity issues where the android device:

-will no longer see the the SoM broadcasting unless the android is power cycled

-will not be able to connect for a period unless the android device power cycled

In both of these cases, sometimes resetting the bluetooth controller on the android fixes this and sometimes it doesn't.

We have used the multiple different android devices and have found that some devices frequent these issues more than others. We also found that exact same model androids react differently and worse than others.

Has anyone else seen or experienced this? Are there any phone settings that could be causing the two above issues?

Is there a "best fit" Android device/OS that pairs with nRF51822 SoC?

Any and all advise welcome. Thank you  

[Hung Bui]

Sorry I mean to test with other nRF51 devices ( when you don't pair, just connect). 

We don't have a list of favorite devices as our softdevice (BLE stack) is qualified for Bluetooth Low Energy and it should work with any device that is BLE certificated. We have thousands of user with hundreds of million of product on the market now so in most cases it works fine with any phone.