Reliance Jio and Airtel has got in tussle yet again, this time over ‘the fastest network’. For the uninitiated, Ookla speedtest network earlier voluntarily released network speed test report, naming Bharti Airtel the fastest network. Reliance Jio later filed a complaint with advertising watchdog — Advertising Standards Council of India (ASCI) — on Monday against Ookla declaring Airtel as the “Fastest Mobile Network” in India. In their clarification, Ookla on Tuesday said that the test was based on third and fourth quarter data of year 2016.

Ookla on Wednesday said data accuracy and neutrality is of utmost importance and the company goes to great lengths to ensure that the information collected on any Speedtest internet test is verified and correct. Now, Reliance Jio alleges Ookla of contamination in the primary data collected by the broadband speed tester platform, in India.

“The carrier displayed in the Speedtest Android application is based on the ‘active carrier’ value returned by the device. Due to limitations of the Android platform, the ‘active carrier’ does not always indicate the actual data provider in devices with multiple SIMs,” said Ookla in a statement “In these situations, Ookla applies additional data sources and mechanisms during post processing to help determine the actual data carrier being tested,” it added.

Commenting on Ookla’s speed testing and result practices, Reliance Jio said, “With reference to the issue of the fundamental flaw in Ookla’s Speedtest methodology which Jio has pointed out repeatedly, we note that Ookla has now admitted to ‘limitations’ in its application, and that it ‘does not always indicate the actual data provider in devices with multiple SIMs’.”

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Reliance Jio’s submission claims a clear contamination in primary data collected by Ookla in India, where nearly 90 per cent of smartphones are dual-SIM devices. “Any results that are based on incorrect and contaminated primary data cannot be definitive, only probabilistic. It is a travesty that such results are being passed off as ‘official’ results by a market-leading operator. We will continue to expose such misleading practices and raise it at suitable forums,” Reliance Jio added.

Now, Reliance Jio has also slapped legal notice to Ookla for what it has termed as its “flawed” test.