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This determination will swing wildly between huge positive and negative depending on what you use the phone for at work or during other "productive" activities,

This determination will swing wildly between huge positive and negative depending on what you use the phone for at work or during other "productive" activities, as well as what you define a productive activity (is watching a film on your phone after work productive? Depends on outlook and who you ask). A field engineer with access to manuals, video calls, a camera, an ERP app and the company expenses and so on: massive help. A guy at a desk with a computer: likely to be a distraction that didn't add anything not already available through the computer.

lotsofpulp 2y ago
One could say similar for Excel, helping MBAs to sell and destroy organizational value that benefits many built over many years for short term gains benefiting a few. Also, in your example, I would expect a smartphone to be more distracting to someone that doesn’t already sit at a desk on an internet capable computer. The person in the field is the one who now has the ability to browse the web or whatever, whereas before that was limited to the person sitting at their desk.