is the prolonged use of mobile causes the chance of brain tumor?

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i have heard and seen in many magzine and newspaper that long use of mobile phone in the particular side(right /left) causes brain tumor or increses the chance of ear defect . this is because microwaves that emits from mobile phone are direct enters in that particular region of brain or ear . which destroy the cells or inactivates the cells . solution of this problem is that..........................while talking on mobile phones always and always use microphone or handsfree or earphone or speaker . pls send ur respones...........................