First of all Appe did not start smartphones. They existed long before Apple got into the mobile business. I think Nokia was probably first with the Communicator, but I am not sure - that was in 1998-9.
Ok I hate to like the wikipedia, becauce there is so much nonsense on the site, but we have to start with the WHo recommendation that more long-term research is needed. Historically, they are at the same point that the tobacco industry was at when they argued there was no conclusive link between smoking and cancer. Innocent until proven guilty has some drawbacks, and lets corporate citizens get away with murder. Still, I criticize the source because it is wikipedia...
The Netfiles bit is indeed a good read. The kind of introspectively scientific document that I would grab on my way to the john. That's a compliment. But it does not say anything about ass cancer. It does insinuate at the beginning that texting could be a cancer averting strategy, but there is no talk of the potential increase in finger and thumb cancer. Also, I notice a lot of people rest their phones on their balls when they text. That can't be good.
Mobilenow is also interesting but says nothing about a decrease in phone calls, just a relative increase in texting. Which is logical, since texting DID NOT EXIST until quite recently lol. Smartphones are so last century. People are starting to carry supercomputers in their phones. The future is geniusphones. For fuck's sake, speak up Siri!
The last 2 bits were very interesting since I have a Blackberry, and just upgraded from a 9000...
Now I said I didn't want to get dragged into quoting inane facts, and I won't. Instead of quoting reams of contradicting nonsense, I will go with a statement that is clean and simple, and show you how common sense & knowledge is at least as reasonable as quoting second-hand 'facts':
The human body contains a huge electrical system. Physio-therapists use electrical currents to stimulate muscles. Sometimes, we kill people by electrocuting them. Electrical systems can be affected by eletromagenetic (ionizing or not) radiation. Put your phone next to your computer speakers and call yourself (you will hear the distinct chugga-chugga of the GSM or CDMA network calling for baby). Try it with a text - same thing. You can cook meat with electical currents and EM radiation. Have a look at the prisoner after the deed is done, or cook up a dog on the 'radar-range'. Microwaves are basically big cell phones you can't talk on. We are made of meat. All of this is verifiable with your own senses, and you don't need a fucking PHD to tell you what you are witnessing.
I don't mean to be a bitch, but facts in this case are a distraction from common sense. Steve Jobs was even smarter than that - he got people hooked on bullshit like 'lifestyle' and 'life on the go', and they forgot that they were handing their children loaded guns and initiating a class war with the underpriviledged, who will one day rise up and demand blood or state-provided geniusphones.