First use of Straight Talk's mobile hot spot allowed me to surf the internet from my NextBookUSA 7 inch quad core 16 GB 4.4.2 kitkat with no problems. When the data got below 100 mb, I saw that Yahoo email and gmail failed to load. A few others sites, like yahoo finance didn't load either. I reset my tablet to factory settings, added more data,and still have the same problems. The tablet is able to access these sites with no problems using WIFI. Is this a mifi device issue, tablet issue, or website issue? Why did I not have these problems before?