Mixed-Bag of Articles of every type. Go through this section and you will have the world to Explore.
4) Stabilize your shot

Lean on a stable surface to stabilize your shot whenever possible. Even if your phone already has optical image stabilization, this allows it to use an even longer shutter speed and/or lower ISO settings without your hand’s shakiness interfering.

13 Tips for Shooting Low Light Photos on your Phone
Not taken with a phone but there’s no reason you wouldn’t be able to. Image Credit: Benson Chan /Flickr

If you really want to be serious, carry a small phone tripod for phones in your bag. If you’re shooting in manual mode, you can even set the shutter speed long enough for cool light trails.