[kroltan]

If your main issue is focus, and you work/are interested in learing in a suitable branch of technology, you can try going "off-grid":

Download every documentation you might need;

Delete every offline-capable time-waster from all your devices;

Remove your phone's SIM card (don't worry, you'll still be able to make emergency calls if such a need arises);

Unplug your internet router (and store it away somewhere inconvenient).

If you have to sync for any reason, go to a expensive coffee shop or the like that has WiFi and do your business there. You'll soon stop going so frequently because it'll hurt on the pocket.