I suppose it's because I'm old but everybody seems to be phoning, messaging, listening, gaming or snapping with their phones all the time....trouble is that includes ME....
Here is a roll, AKA 36, with the smartphone as the common denominator and I never understood that either in Math at school.
Slideshow music:The Key by Tosca.

At Belsize

At Belsize

Been To Pret

Been To Pret

Down Below

Down Below

Cafe Talk & Text

Cafe Talk & Text

Eat As Much As You Lik

Eat As Much As You Lik

Eye To Eye

Eye To Eye

Good News For Some

Good News For Some

Ground Control To...

Ground Control To...

Have I Got Wi-Fi

Have I Got Wi-Fi

Him & Her

Him & Her

I'm Not Talking To You

I'm Not Talking To You

Happy Talk

Happy Talk

In & Out Doors

In & Out Doors

No Sitting Any Time

No Sitting Any Time

Leicester Texting

Leicester Texting

Oh & 0

Oh & 0

Lunch By The River

Lunch By The River

On The Corner

On The Corner

Replying

Replying

Reading Messages

Reading Messages