I have been having a strange occurrence with my mobile hotspot recently. I have the play more unlimited plan and 15gb of 4g hotspot usage after which i have unlimited 3g usage. I have been using my hotspot and have been getting around 50-70 ping/latency before and after my 15gb of 4g has been used up. Recently I had my insured phone replaced due to a cracked screen. I received my replacement phone and simply took the sim card out of my old one and put it into the replacement. I proceeded to use my mobile hotspot until the 4g ran out and some after that. For some unknown reason my latency has inexplicably jumped to 300-400 but here's the thing, it is only 300-400 a minute after me turning my hotspot on. After every time I turn my hotspot off then turn it back on I get the usual 50-70 ping but then a minute later it goes up to 300-400 and stays there. I would like to point out that I have gone over my 15gb limit for this month but I have gone over my limit in the past and had no issues with latency. These problems started happening as soon as I got my replacement phone which just so happened to be as soon as my 15gb 4g had run out for the month.