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iPhone 7 With Qualcomm Modem Performs 30% Better Than iPhone 7 With Intel Modem [Report]
Apple dual sourced the LTE modem for the iPhone 7 from Qualcomm and Intel but the two modems don't perform equally, according to a new report from Cellular Insights.We've heard complaints about this since the launch of the iPhone 7. Users claimed that the Intel modem found in the AT&T and T-Mobile models didn't perform as well as the Qualcomm one in Verizon and Sprint devices.Cellular Insights compared the performance of both the Intel XMM7360 modem and the Qualcomm MDM9645M using a Rohde & Schwarz (R&S) CMWflexx setup containing two R&S CMW500 and one R&S CMWC controller, as well as the R&S TS7124 RF Shielded Box with four Vivaldi antennas.At -96dBm the Intel variant needed to have Transport Block Size adjusted as BLER well exceeded the 2% threshold. At -105dBm the gap widened to 20%, and at -108dBm to a whopping 75%. As a result of such a huge performance delta between the Intel and Qualcomm powered devices, we purchased another A1784 (AT&T) iPhone 7 Plus, in order to eliminate any possibility of a faulty device. The end result was virtually identical. We are hoping that this sudden dip in performance at a specific RSRP value will be further investigated by the engineering and hopefully resolved. At -121dBm, the Intel variant performed more in line with its Qualcomm counterpart. Overall, the average performance delta between the two is in the 30% range in favor of the Qualcomm variant.
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