How can I speed up my internet connection without changing my internet speed from the ISP (I can't get a faster speed)?

You can’t. There are some tricks if you are sufficiently technical but that doesn’t give you much of an improvement plus there are lots of variables involved.

What speed are you paying your ISP for, and what speed is being delivered over your wifi?I was paying for 100 MB up/down. Over wifi when doing speedtests I’d consistently get in the 20s throughout my home (even decently close to the main access point/router).Then I learned more about mesh networking. This is an enterprise grade technology called that is now coming to consumers from a number of start ups. It makes it super easy to create a wifi network that has a strong signal throughout your home or business, and you can easily add more modules to connect further distances. It allows close to the full speed delivered by your ISP to be broadcast throughout your home (eliminating deadzones and speeding up your connections!) The only potential drawback is the price.Below are two great options for you that will not disappoint as long as you can afford them. They are a little on the spendy side. They both come in 1, or 3 packs depending on the size of your home.Luma (backed by Amazon) - http://www.amazon.com/Luma-Home-WiFi-System-3-pack/dp/B017DV1BPG/ref=as_sl_pc_qf_sp_asin_til?tag=eerovsluma-20&linkCode=w00&linkId=fcffc43fe300b9a8dfb45edf1ac7dbe4&creativeASIN=B017DV1BPGor Eero - http://www.amazon.com/eero-Home-WiFi-System-Pack/dp/B00XEW3YD6/ref=as_sl_pc_qf_sp_asin_til?tag=eerovsluma-20&linkCode=w00&linkId=3a5a2f9038ac21ba1937daa608f500d3&creativeASIN=B00XEW3YD6Both are great options to providing coverage, and eliminating the ‘headache’ of bad wifi!Let me know if this is what you are looking for! If not I have a few other ideas, but this is definitely the best option. We have 4 eero's in our home and love them! After installing our eeros we had consistent speeds above 60 up/down, and many times were in the 80’s - 90′s. Not to mention eliminating our deadzones.

Short answer; you can’t.There are many variables involved. But odds are, they are rate limiting you through the Operating System of their edge router. So unless you found a way to authenticate through ssh to the PE (Provider Edge) router, you’re out of luck. If you did find a way to do this, you’re opening a whole other can of worms, and it’s really not worth it.Aside from just that, the media they’re using, the modem you have etc, all plays into it as well. The modem or media might not be able to operate at a higher speed than you already have.All the stuff I mentioned is just about the speed of your internet in general, not WiFi specifically. Your wifi speed can vary based on EMI (Electromagnetic Interference), distance, and other things. I’d suggest reading up on that as far as your WiFi goes.