Make us your home page  Do the math before getting a cellphone
upgrading plan  Chicago Tribune  Smart consumers know that when
a sales pitch involves convoluted math, chances are it's not a
good deal. That alone is a warning sign against early upgrade
plans being sold by the four major mobile phone carriers during
the past year.  But not so fast.  While many reviews are
lukewarm on the value of early upgrade plans for people who
prefer the latest handsets, the plans can be a good deal for the
opposite people they're aimed at: customers who hold on to their
phones a long time, experts say.  As if it wasn't hard enough
understanding pricing of cellphone plans, starting a year ago,
T-Mobile, Verizon, AT&T and Sprint began rolling out early
upgrade cellphone plans aimed at gadget lovers who could get
their hands on the newest smartphone annually or even sooner.
Under traditional plans, customers had to wait about two years
before they were eligible for a new phone at a discounted price.
That's where the convolut