Huuummm....How do i get it back?

[fever02]

Ok.. so it's like this... i have wifirouter (love it best 30$ i've spent in a while!) and monday night im in the kitchen and heard the phone beep and I recieved a "P??" something update. This was automatic and also made my phone soft reset. With that said, i do have to say the previous days I was surfing it up , chatting messanger, and youtub (tubed it up...Fred.??). . When I start up the router I use the youtube cab for the internet then start the wifi. I also ended up using like 1g... since start of new cycle..lol. Thats the biggest jump in data ive used since i ve been with them like 8yrs...I did a speed test lastnigh and got back ".52" but i was getting at least "1.6" before. Where did my speed go and can i get it back? Oh.. i have the 69$ unlimited everything. 450mins plan