Don’t play games, or generally use the phone much, when the device is charging, as they require extra processing power.

Press the back button twice when exiting an application, instead of simply tapping “Home”, this closes the app from the background and prevents the excessive drain of power.

If the phone is charging slowly, disable any unwanted applications that may be unnecessarily syncing in the background.

An official fast charger from HTC is available, and there are some good options available on Amazon as well.

Keep in mind that while the One M9 comes with Qualcomm QuickCharge 2.0 fast-charging capabilities, the available charger included in the box does not support this, which might result in you thinking that the device is charging slower than expected.

Delete old and unused profiles, and try setting up the connection once again from scratch.

If the Bluetooth device saves multiple profiles, you might have reached the limit for the number of profiles it can save.

Restart the phone after clearing the data and cache.

If the problem continues, clear the cache for Bluetooth by going to the Bluetooth Settings.

Start by turning the Bluetooth on your device off and back on again.

Make sure that no power saving mode is enabled.

Find the MAC address for the phone by going into Settings – About Phone and ensure it is recognized by your router.

Disable Power Saving Mode through Settings.

If necessary, simply switch to a different channel.

Check the level of activity on your current channel with the Wi-Fi Analyzer application.

Go to the Wi-Fi settings on the device and forget the preferred network, before entering the details again from scratch.

Turn off the router that you’re using and the phone, and wait for a while before turning them back on.

Reinstalling htc one m9 software update