So, if you work from an office, but also travel a lot, just set your regular location in the app, then whenever you leave, your calls will come to your Android phone. When you're back in the office, the divert is automatically switched off. No logging in, no forgetting, simple.
This free app gives you the freedom to travel without worrying about missing calls or having to set diverts on your phone and knock them off again when you're back.
It works exactly like setting a divert in your online Voipfone Control Panel - it costs the same too - but is fully automatic.