Another great reason to not carry a cellphone:

From an MSNBC article:

"In what could be called the worst 'pocket call' ever, an Oregon man who's in Afghanistan fighting with the Army accidentally called his parents a few weeks ago during the heat of battle. The call, during an active firefight, is harrowing to hear (the soldier’s brother has posted the audio file on YouTube). The solider(sic), Stephen Phillips, had tried to call his parents earlier in the day, so all it took was a bump against the phone's redial button."

Cellphones are now ubiquitous enough to carry into combat? That seems as smart as a pocket full of loose change while on patrol.