if you use a headset or earphones with your mobile phone, it probably won't be as harmful.

In my case, I usually use my mobile phone to send e-mail. Sometimes I use it to make a phone call but those occasions are few and far between. So...it hasn't been harmful to me....and of course I don't use the mobile phone and drive at the same time.

Yes, there is possibly some small risk from using mobile phones. It is vastly lower than the risks from smoking, driving or crossing the road, and probably significantly lower than the risk from TVs and TV transmitters. After many years of research, there is still no clear proof of any risk at all.
Statistics show that you are more likely to win a lottery jackpot, be struck by lightning, or even spontaneously combust than you are to be damaged by using a mobile phone! You are very likely to injure yourself as a result of tripping over the wire loop of a fixed phone(!). This is a frequent cause of accidents!!

It may seem that mobile phones cause negligible radiation in comparison to microwave ovens but a simple calculation will show you the opposite.
If you talk on the cellular phone just one hour a day the whole radiation is as follows:
1 hr a day x 365 days a year = 365 hours
365 hours x 3 watts = 1095 watts
1095 watts x 10 years = 10950 watts!!!

10.000 watts radiation of cellular phone (ten times more powerfull than microwaves ovens) is as if you would put your head in a microwaves oven.
You can imagine what would happen to you... you would burn like a sausage.

Cell phone can do biological damage through heating effects >>>> This causes: headaches, earaches, blurring of vision, short-term memory loss, numbing, tingling, and burning sensations, bad sleep.

And my certain answer is::::::::

I was in charge of a research one year before. The results was 50-50
I mean that if you have a mobile with Bluetooth then you have bigger problem than when you call somebody.
It is also another microwaves than they haven't passed from your mind : the WLAN (g and b protocols)
So the general result was : the mobile has the less radio from any other things in your home.......

Here are some things that you must know :

<<<Research on mobile phones is difficult to interpret

The jury is still out on whether mobile phones harm users' health, according to an investigation by the New Scientist.

The report comes as new research is expected to show improved reaction times for people who use mobile phones.

A study by the University of Bristol, to be published in the International Journal of Radiation Biology on Thursday, suggests mobile phone users have reaction times which are around 4% faster than non-users.

Alan Preece, who led the research, speculates that it could be that the microwaves from the phones speed up the flow of electrical signals through a part of the brain which connects areas related to vision and language.

But he does not know why they might do this and what the long-term effects might be.

Nematode worms

David Concar of the New Scientist says other studies of mobile phones have come up with similar surprising results.

Research by the University of Nottingham found that nematode worms exposed to microwaves grew 5% faster than normal.

This suggested that microwaves increased cell division, leading to fears of links between mobile phones and cancer.

However, David de Pomerai, who led the research, says there is no reason to panic.

"Exposing a nematode worm to microwaves overnight is like exposing a human continuously for an entire decade," he stated.

The team are trying to figure out what causes the changes.

They believe they may be related to stress.

Henry Lai at the University of Washington found that rats exposed to microwaves showed signs of stress.

For example, they produced natural painkillers called endorphins.

Other research suggests that microwaves may impair the electrical activity of rat's brains and weaken their reactions.

But David Concar says the implications are not clear because the research, by John Tattersall at the Defence Evaluation and Research Agency, only looked at microwaves' effect on cells from deep within the brain.

Mobile phones would be unlikely to affect brain cells at such a level, says Mr Concar.

Cancer

Other studies have suggested mobile phones could increase the risk of cancer.

But all have been difficult to substantiate. For example, an Australian study of mice which suggested microwaves from the phones increased the likelihood of developing lymphoma.

But the results have been impossible to reproduce.

Meanwhile, a US study found that mice exposed to microwaves for two hours a day were less likely to develop brain tumours when they were fed a cancer-causing chemical.

Mr Concar says the discrepancy between studies suggests that any cancerous effect mobile phones may have is likely to be tiny.

However, he adds that it is still too early to know whether the phones can cause changes to brain activity and memory.

The World Health Organisation is finalising plans for the biggest ever study of mobile phones and their health effects.

The $6m study, which is partly funded by mobile phone firms, will compare the mobile phone use of around 3,000 Europeans with brain tumours with a control group without tumours.

However, there are concerns that the study's results will be difficult to interpret, for example, because brain tumours can take years to develop.

Shields

The New Scientist has also investigated whether devices for shielding people from microwaves are effective.

It found that performance depended on the type of phone.

Hands-free mobiles were the least likely to cause radiation problems.

Meanwhile, researchers at the University of Surrey are developing a smart antenna which directs microwaves away from the head. >>>
(BBC news)

I highly doubt there is a major saftey risk, the radiation one would recieve is utterly miniscule when put into comparison with our normal daily exposure. Most of which comes from the sun.

Also its safe to say that there is no short term risk from exposing one's self to cell phones, else there would be a reasonable trend forming by now showing people who are long time cell phone users dropping by the wayside. or more likely, having 3 eye'd babies, and testicular cancer. (hopefully not both at the same time.)

A long time ago, I saw this little thing that you put on the speaker supposedly blocks the radiation on some TV ad. If you ask me these days, it seems like bogus (except to all those teenage girls - and even guys - who yap almost 24/7; you know what I mean ) , especially to me, because I rarely use a cell phone.
Also, as far as exploding cell phones go, see this article on PC World, about counterfeit hardware peeking in all over the world.

they fry your brains. use a headset or atleast the earphone thing that most phones come with in accessories.

Well it probably cant be any good. I guess it will be after long term usage or something, but then again we have other things to worry about, in my particular case, I would worry more about using the pc than using a cell phone (because its what I use the most) not because of my brain, ... I hope, but I do worry about my vision, also sleep, so If I ever have a problem because of a cell phone it probably will be to late because the pc or lack of sleep are a step ahead.