That's good FOR YOU. 6 gb a month? I normally do about 40-50. I've done 100+ before. Others have done hundreds of gb. Att lte is still better overall than Tmobile. I have Tmobile as my phone service btw. You need a hotspot? Jb an iPad or get a unite pro.
I hope you can see the value of unlimited, never throttled att 4g lte for 29.99 a month. Some are using it as their home internet. The savings if you are a data user far outweigh the costs.
I don't use it as internet at home but I have regularly used 150 gigs before. We drove 16 hours last weekend and my kids streamed movies the entire way. Imagine how much 32 hours (16 hours x 2 iPads) of streaming would have cost on AT&T.