iPhone7 LTE chip measured Qualcomm performance exceeds Intel

In the iPhone7 and iPhone7Plus, Apple chose two LTE chip vendors: Qualcomm and Intel. The iPhone 7 models A1778 and A1784 use the Intel XMM7360 chip that supports GSM, while the iPhone 7 models A1660 and A1661 use the Qualcomm MDM9645M chip from GSM/CDMA. Apple's decision has been frustrated by many people, because only Intel-compatible operators that support GSM do not have GSM/CDMA Qualcomm chips. Now, according to tests by independent test organization Celluar Insights, Qualcomm LTE chips are far superior to Intel chips.

By using the R&S TS7124 RF shadow box, two R&S CMW500s, one R&S CMWC controller and four Vivaldi antennas. Celluar Insights built two test scenarios that simulate different distances from the tower. There are two iPhone 7 Pluss in the test, each equipped with Qualcomm and Intel's LTE chips.

The test method starts with the strongest LTE signal -85dBm, and gradually reduces the power, and the distance between the analog and the signal tower is getting farther and farther. The LTE bands tested include: Band 12, Band 4, and Band 7, which are the three most common LTE bands in the United States.

In the three tests, the two iPhone 7 Plus performed similarly in the ideal signal situation. However, when power is rising, the performance of Intel chips is rapidly declining, and Qualcomm's chip performance is 30% higher than Intel chips. As signal strength continues to increase, Qualcomm chips can maintain higher throughput than Intel chips.

In the real world, this means that Qualcomm chips will provide better performance in weak signal environments. Celluar Insights also created charts that compare LTE chip differences between different smartphones, with the X-axis representing a weakening signal strength and the Y-axis representing the best LTE new energy that smartphones can offer. In the test, the iPhone 7 Plus with Intel chips was the worst performing smartphone.

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