I tested the service extensively in Mumbai, Pune and Bangalore and was impressed with the results. Even on the highways between Mumbai and Pune, and Bangalore and Mysore, the data speeds were impressive, ranging from 2 MBps to 35 MBps, which is more than enough to get the job done on the go.For example, at the BloombergQuint office in Elphinstone, central Mumbai, I barely managed to get a speed of 1 MBps on Jio. In the same location, on Vodafone 4G, the speed was as high as 12 MBps.Also, as of now, most calls don’t connect on the Jio network in the first place, so you could only imagine the impact that added usage would have on this phone’s battery life, if and when Reliance Jio sorts out its connectivity issues! If you’re an entertainment junkie, then this might just seal the deal for you. On my regular phone, Apple Music is my preferred music streaming service. But while testing the Jio services, I was pleasantly surprised by the extensive library of high-quality music and movies.So, for now, that makes the JioFI router a must have in every pocket for lightning fast internet speeds. But, if you’re sitting on the fence about ditching your existing smartphone SIM, then it’s safe to say, it won’t hurt if you remain seated a little longer.