Earlier, we read from WHO study that mobile phone may cause brain cancer. Now, a Danish study says no increase in brain cancer due to mobile phone use. There are conflicting statements/reports from different study groups. Whatever it is, as electromagnetic energy can have biological impact, it is better to minimize exposure and follow the principle of ALARA i.e as low as reasonably possible.
If you are a business man and sitting at one place use fixed phone instead of mobile phone. If you are on the move, you can postpone your conversation till you reach your residence or office. If you are a marketing executive on the move, use earphones that are declared safe. Use of mobile phone on move also introduces other hazards like lack of concentration and can involve you in road accidents.
You may be lured by mobile applications, but the time spent on surfing or learning the applications is more than the actual gains and burning the pocket.