There are a few ways to wield a smartphone.
1. The teenager holds it in two hands while stabbing rapidly at the screen with both thumbs.
2. The suave 20 something year old bends the laws of physics to balance it in their hand while using the same hand to interact with it.
3. The confused old lady holds it up to her face with one hand, angles her head back so she can look down her nose at it while narrowing her eyes in concentration, then jabs at it suspiciously with her other.
It turns out I am a confused old lady.