MOUNTAIN VIEW, Calif.--Mobile device performance analytics firm, Metrico Wireless, has released its report on the iPhone 4S and its relative performance across the phone's three supported U.S. networks; AT&T Inc., Sprint Nextel Corp. and Verizon Wireless Inc.
Metrico put the 4S through its paces on everything from call performance (making and holding calls), to voice quality (of the handset, speaker, Bluetooth and in noise), to data performance (HTTP download and HTTP upload), web browsing (page load times and page load reliability) and video performance (frame delivery rate, freeze, impairment and audio).
During the course of its analysis, Metrico said it performed over 21,000 web page downloads, ran over 8,000 data download/upload tests while mobile and while stationary, and generated approximately 6,000 voice calls.
The 4S was found to have a higher call success rate on Verizon Wireless’ network than on either Sprint or AT&T, though Metrico noted that Sprint’s 4S performs better than rival carriers in live network voice quality on the uplink, while AT&T’s iPhone 4S takes the lead in live network voice quality on the downlink.
Indeed, when compared to other 3G devices sold by the three carriers, the 4S was found to be among the top performers for speech quality in noise; average when it came to speech quality over Bluetooth; and a bit below average when it came to speakerphone speech quality.
Despite the call success rate being highest on Verizon, however, Metrico said the 4S was still “well below average” compared with all other 3G smartphones measured for call performance in the carrier’s portfolio.
In terms of download speeds, AT&T’s 4S outperformed both Sprint and Verizon “by a considerable margin” with Metrico noting that web browsing was faster on the AT&T version than on the Verizon and Sprint versions. The 4S also managed to outperform over 70 percent of competing 3G Smartphone models tested on the three networks.
On AT&T, Metrico reported a mean page load time of 1.29 seconds when web browsing, compared with 2.60 seconds on Verizon. This signifies an improvement for AT&T over the last generation iPhone 4, which had almost the same page loading times as its counterpart on Verizon. Similarly, the 4S itself also shows a considerable speed up in web page load times than the iPhone 4 on all three carriers.
Metrico said the 4S also shows “excellent data task reliability” with very few video freezes or impairments and a very high rate of audio delivery, across all three carriers.
Finally, in terms of video playback, Metrico reported that the 4S showed comparable, high rates of video frame delivery across all three carriers, though video frame delivery rate dropped when playing a YouTube clip through the YouTube application. Despite this, Metrico said subscribers were still “likely to perceive good quality.”