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iPhone 3GS: the upload speed is limited to 384Kbps

iPhone multiplies by two the download speed but not the upload speed which always remains at 384 Kbps. Here is the result of a test carried out in recent days by the American site Macworld.com

The repeated tests involved the networks of different operators. While in download it is possible to easily reach even 1Mbps and beyond, during upload the speed remains constantly below the limit of 384Kbps. Confirming the real performances recorded by users comes the detailed analysis of the internal components of the smartphone performed by various companies specialized in repair and disassembly, including RapidRepair according to which Apple would use a UMTS / HSDPA chip with the uplink stopped, precisely at 384 Kbps, a typical speed of the old UMTS.

In practice, in the latest version of the Apple smartphone has significantly improved the downstream connectivity by integrating circuits and support for the latest HSDPA technology with maximum theoretical performance up to 7.2Mbps, twice the iPhone 3G that supported the previous version of the standard with speed up to 3.6Mbps. Cupertino, on the other hand, has left the section that deals with the upload that remains the first generation UMTS technology unchanged in the iPhone 3GS. If it were iPhone not an HSUPA phone, a technology which, depending on the version adopted, allows data to be sent over the Internet at very high speeds; in Italy, for example, on his so-called "hi-speed" UMTS it reaches up to 1.4 Mbps in upload.

Tests carried out in these hours by Macity in two large cities in Northern Italy between yesterday and today, confirm that the maximum iPhone speed in Tim network download is significant (constantly between 2.5 and 3 Mbps) while in uploading it remains constantly (and widely ) below 300 Kbps

Ultimately as regards sending data to the Internet, the new iPhone 3GS offers identical performance to the previous iPhone 3G model. While in the United States the problem is less felt because the transition from UMTS to the latest HSDPA and HSUPA still in progress, the integration of HSUPA would have represented a significant advantage for many European users. In many countries, in fact, cellular networks are already ready to support these higher performances, which are particularly useful considering the video functionality and the possibility of uploading movies on the fly.