The future of mobile phones
Since Nokia launched the world's first mobile in1984, the 9.8 kg Mobira Talkman, mobile phones have got smaller, lighter and smarter.
Each new year sees new developments, more features, and smaller and lighter models.
Now they weight less than 100gm and are web-enabled, can send and receive emails, provide high quality photos and videos, stream videos and music, and respond to voice commands.
4G and 5G mobile phones
So what's next from the amazing mobile phone? Nokia asked design students to suggest the phone in five years time when 4G and even 5G would be available.
The winning design was a candy bar-style device, which swivels to sit in a freestanding right angle to make video calls more comfortable.
The compact handset also includes a trackball, enabling it to act like a mouse. And when not in use for calls or web surfing, the phone doubles, or is that triples, as a picture frame.
How about a phone the size of a credit card, designed to be worn around the neck?
Or an environmentally-friendly model, that after analysing its user's day-to-day carbon footprint, rewards the climate conscious owner with free calls and texts.
Another necklace phone has beads representing different contacts. Squeeze the bead to ring that person. Another model could be worn as a ring.
Mobiles that double as sunglasses could appeal – so long as you're not the type to keep losing your favourite pair!
Fancy some aromatherapy? The Scentsory is a phone that folds like origami into an envelope shape and allows you to share scents and ambient lighting with your contacts.
Of course you won't need to throw out your old 2009 model. Just slot it into a special cradle that allows it access new 4G or 5G services and bandwidth as they arrive, including home security images from your web cam.