The problem seems to be that without solid scientific proof that exposure to cell phone radiation causes cancer; governments are unwilling to take a stand proclaiming them a danger to humans. However, it is impossible to set a safe exposure level standard until scientists can prove that this low-level radiation isn't responsible for the symptoms the victims of electromagnetic sensitivity suffer.
Part of the problem is the latent period; that is, the time between exposure to radiation and cell mutation. A person exposed to low-level radiation may develop cancer twenty years later, but by that time it could be blamed on any number of factors including genetics, pollution or smoking tobacco.
Until scientific evidence either proves or disproves the link between non-ionizing radiation and cancer, it is up to each person as an individual to try to limit their exposure to these potentially harmful rays.