How to fix battery drain issue on Samsung Galaxy S5 G900F

DO NOT DO FACTORY RESET, just wipe cache partitions.

Turn off the device.
Press and hold the following three buttons at the same time: Volume Up key, Home key, and Power key.
When the phone vibrates, release the Power key but continue to press and hold the Volume Up key and the Home key.
When the Android System Recovery screen appears, release the Volume Up and Home keys.
Press the Volume Down key to highlight wipe cache partition.
Press the Power key to select.
When the wipe cache partition is complete, Reboot system now is highlighted.
Press the Power key to restart the device.

Thanks to  https://thedroidguy.com/2017/01/solutions-for-galaxy-s5-battery-drain-issue-1049822

How to connect to wifi on the London Underground

From here...

http://help.ee.co.uk/system/selfservice.controller?CONFIGURATION=1016&PARTITION_ID=1&secureFlag=false&TIMEZONE_OFFSET=&CMD=VIEW_ARTICLE&USERTYPE=1&ARTICLE_ID=341401

It's easy to connect to WiFi on the London Underground.

If you're an active EE, T-Mobile or Orange mobile customer then just text EEWIFI to 9527 and we’ll send you a password to access the service when you next go on the Underground.

Once you’re underground in a participating station, just follow these simple steps to connect:

1. On your device, turn WiFi on
2. Select Virgin Media WiFi from the list of available networks
3. Open your web browser and follow the prompts on the Virgin Media portal
4. Select EE and register using your mobile phone number and the password that we sent to you by text

Once you’ve connected to the WiFi once, you’ll automatically connect every time you enter a WiFi enabled station (as long as WiFi is switched on on your device).