CELL PHONES are a convenience in today's society. They can summon help for a stranded motorist and connect people in airports and trains.

A child can reach a parent on his commute home. But cell phones depend on electromagnetic radiation. How safe are they? Are consumers being informed?

Various European countries have conducted studies of longtime users of cell phones and found an increased incidence of brain or acoustic tumors. Other studies cite disturbances in the body's energy systems.

A University of Nottingham study showed that using cell phones accelerates aging and may prevent the immune system from working properly. If any of this is true, a case could be made for reserving cell phones for emergencies only. The price for frequent and extensive use may be very high in the long run.

Carol J. Ward, Ardmore

Reid family problems

Re Stu Bykofsky's Feb. 5 column "Blame the Reids? Do you have kids?":

I understood and valued the inclusion of Bykofsky's own family experiences with his son. Hopefully, other parents, including the Reids, can find solace in knowing they're not alone.

Katherine J. Gilmore, Philadelphia

Considering the disgrace that his sons have brought on the Eagles franchise, and how he has ruled the team with an "iron fist" when dealing with malcontents or troublemakers, I believe Andy Reid should resign as Eagles head coach - or he should move to disown both his sons.

Bill Slevenski, Philadelphia

'Tribune' parking dispute

My wife and I lived near the Philadelphia Tribune offices for many years and were always irked by the parking situation (article, Jan. 29).

I understand having "Press Parking Only" signs in front of City Hall or other places where the media needs access to report the news, but in front of an office is ridiculous. What next, "Flower Shop Parking Only" or "Dry-Cleaning Employees Only - All Others Towed"? The Tribune is a for-profit enterprise and should have to provide for its parking like anyone else would have to.

John Barringer, Philadelphia

Bus aid should be easier

I ride SEPTA, but sometimes when elderly people try to climb on the bus, the driver will not let the step down. They shouldn't have to ask.

I have arthritis in my lower back. I'm in my early 50s. I ask for the step to be lowered, only to be asked sternly: Why do you need the step lowered?

Lila Beckett, Philadelphia