For those interested in digging into the facts and data, this FCC document is actually pretty good and no white wash in my view: <a href="https:&#x2F;&#x2F;transition.fcc.gov&#x2F;Bureaus&#x2F;Engineering_Technology&#x2F;Documents&#x2F;bulletins&#x2F;oet65&#x2F;oet65b.pdfhttps:&#x2F;&#x2F;transition.fcc.gov&#x2F;Bureaus&#x2F;Engineering_Technology&#x2F;Documents&#x2F;bulletins&#x2F;oet65&#x2F;oet65b.pdf" rel="nofollow">https:&#x2F;&#x2F;transition.fcc.gov&#x2F;Bureaus&#x2F;Engineering_Technology&#x2F;Do...</a> 
I hope that link works but you can google the title &quot;Evaluating Compliance with FCC Guidelines for Human Exposure to Radiofrequency Electromagnetic Fields&quot; and it comes right up. 
There are some interesting tables and graphs for the TL;DR
Figure 1 on page 30, shows the relationship between distance and ERP to the power density. Then Table 1, Page 72.  Most cell phones operate in the .6 - 2.5 Ghz range and the power is ~ 100mw range. 
Cell towers operate at about 40 - 60 W ERP, the distance depends on where you are.