To what extent is cell phone addiction induced and maintained by subliminal mind control manipulation via electromagnetic signals emitted by those same devices?

This, in fact, is very much the case. While humans have many tendencies in common based on their makeup, the inner instincts driving some behaviors and a common psychological makeup that is further narrowed in its application by cultural constraints and shaping to train people in effect how to respond to many stimuli. And so this will happen within a fairly narrow range of variations. There is nothing inherently captivating in messages or data streaming through a device. When there are many demands on one’s time, many distractions and enjoyable things in life including quiet and having inner peace to surrender oneself in a slave-like fashion to an electronic device and its streaming data is not normal. The rewards are not in proportion to the investment. When people do this hour after hour after hour and, in many cases, it rules their life by commanding the majority of their free time, as well as some time that should be spent elsewhere doing work expected on a job, or attending to actual physical people in a social setting, or driving somewhere at a time when attention is better spent on the journey and possible hazards, especially when there is bad weather or there is an unfamiliar route being taken where things may happen unexpectedly and require quick thinking. The compelling need to look at one’s screens is largely determined by the entrainment of their thoughts and actions because of subconscious programming via the electromagnetic mind control signals emanating from most electronics at this point, in addition to propaganda of all kinds and incitement to commit acts of social unrest, to demonstrate for causes that will stir up things and cause turmoil, as well as planting seeds for taking the law into one’s own hands, or committing acts of vandalism or harm to others by lashing out in anger when that can be done to extremes depending on the inner nature of each person. These are not a natural consequence of using a cell phone but people will come away with the inner thoughts planted to move in those kinds of directions depending on their inner leanings and vulnerability they may be pressed into action to support a false cause designed to drive a wedge between factions and increase the friction between people to get everyone pointing fingers at one another, mistrusting, disliking, and even despising those in the opposite camp who themselves are there because their inner tendencies are being exploited to take an opposing view, and then both sides dig in and view each other with disdain and suspicion and may well go to war in ways large and small. This is all an orchestration of human behavior to disrupt society and this serves the Cabal.