Tethering to Kindle Fire from Samsung Note 4

I recently bought a kindle fire for my kid. We currently do not have a home isp. So I figure turn on the hotspot on my Samsung Note 4 share it's Internet connection to download some apps and games for him. Trying to figure out why downloading apps from the kindle is so slow when using my phone as a Hotspot. It's not even bearable. (0.05kbs) I also can tell that Web surfing, and downloading files are just as slow. Whats strange is that I can play videos fine without any buffer problems. A speed test app says I'm getting over 15mbs. While a speed test on Google Chrome says 0.05 kbs. Any helpful info would be helpful! Thank you.
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