The iPhone 3G (2.2) is the best
performer for call reliability out of six smartphones, according to a new
report, All Phones Are Not Created Equal,
by Andorra-based Mobile Test Labs.
The six smartphones were tested in
static, walking and in transit modes for: call setup; call maintain; call
maintain during soft handover; and call maintain during IRAT (inter-radio
access technology) handover.
The six smartphones featured in the
test were: Blackberry Bold 9000; Blackberry Storm; Apple iPhone 3G (then with
v2.2 firmware); Apple iPhone 3G (with the v.2.0 launch firmware); Nokia E71;
Samsung SGH-F480 Tocco; and the Sony Ericsson C905.
The tests found that performance
varied enormously and none of the handsets were good at everything.
Two general observations could be
made: a handset that was bad at adding a radio link, usually performed poorly
in the handover test where it tried to add a new radio link; and handsets that
had problems maintaining a radio link, usually dropped a call easily in a
handover scenario, where it was subject to interference from a second call.
The report also found that the sheer
amount of features now expected to appear on a smartphones could compromise
overall performance of the phone. The phones are running out of room and
processing power, which does not bode well for performance, not only for call
reliability, but also for data and video applications.
The Samsung recorded some excellent
results, but struggled in the single-cell call set up and maintenance areas.
The SE C905 was a largely consistent
performer, but had some weak areas. The Nokia performed well in setup, but less
well in some of the call maintenance tests. The two RIM handsets performed very
differently with the Bold performing much better than the Storm.
But none performed perfectly, which
indicates that there are big improvement opportunities to be made by handset