Android since version 6.0 introduced a feature call Doze mode. It is a mode which the operating system (Android) will forcibly shut down GPS, Internet from any app running in the background i.e. when the phone screen is off, in order to save battery.

Not every phone manufacturer enforces this feature but from our user base, we’ve come to know that Samsung phones tend to implement this feature, especially on the newer models. Unfortunately, there is no way to turn this feature off entirely on Android phones - you can only exclude certain apps from Doze mode. Please take the steps below for all your Android 6.0 (and above) phones - steps may differ on different Android systems:

1. Go to Settings

2. Go to Battery

3. Go to Battery Usage

4. Tap on the 3 dots menu on the top right-hand corner

5. Tap on Optimize battery usage

6. Tap on the drop-down menu and select All apps (default should be showing Apps not optimized)

7. Scroll down to find Detrack and turn off Battery Optimization.

8. Tap on the drop-down menu again and select Apps not optimized. You should see Detrack in the list.

For Samsung phones, please take the further steps below:

1. Go to Settings

2. Go to Battery

3. Scroll down to find App power monitor

4. Tap on Unmonitored apps

5. Tap on Add apps

6. Find Detrack, select it and tap on Done

You will also have to make sure that the phones do not run any Battery Saver or Battery Optimized mode, and must be put on Full Performance mode.