It all comes down to what you need in a phone, the service reliability in the areas you work and what you are willing to pay for. I use an iPhone and its my third arm. It's more like a hand held computer that has a phone as an accessory. I have many codes, catalogs, and I could put constuction drawings and specs on it if I choose too. They are not cheap but mine has paid for itself many times over.
Smartphones in general have many apps that can make the job easier and be more effective on the ground. The camera, email, instant messager, and internet as well allows me to be effective in the field.
What ever phone you get, it's s business expense hence it's a right off
