Wiko devices are however definitely problematic in terms of non-standard background process optimizations and adjustments to the settings that need to be done to make apps work properly.
Turn off Eco.Mode and disable Optimized mode
- Go to Phone assist
- Tap on Power Saver
- Turn off Eco. Mode
- Tap on Optimized mode
- Disable Optimized mode and make sure your app is not optimized
Add app to background whitelist
- Go to Advanced settings
- Tap on White-list apps background
- Find your app in the list and enable it
Go to dialer and put the code *#*#86569726#*#* and uncheck Lowram Enable And Background enable.
Note: This needs to be done again after reboot.