Slow internet on laptop but fast on phone

Hi I'm not a tech-y person so I'm just hoping that someone can help me.

I recently bought a new laptop it's a Lenovo G40
System:
  • Intel Core i5-4210U CPU @ 1.70GHz 2.40 GHz
  • RAM: 4.00GB
  • 64-bit Operating System
  • Windows 8.1 Single Language
I got home, downloaded and installed Firefox for me to use as my default browser. I got to use it for awhile (about 3 hrs) then I tried going on Facebook and it was taking too long to load. Then I tried it on my phone, it loaded faster than on my laptop. I tried searching (on both devices) random stuff on google (e.g. Miley Cyrus) and it took my laptop about 3 mins to load and my phone only took less than a minute to load. I did a speedtest on my laptop and I got 3.4mbps as a result (that's fast enough right?).

I really hope someone could help me with this because I'm currently student and I have a lot of requirements to do and I can't do that without a laptop and internet.
 
So, all 3 are on WiFi. Can you run a test with either of the laptops connected with an Ethernet cable and let us know the results? I suspect your wireless router has 802.11N, and that your phone supports it but your PCs only support 802.11G. 802.11N and G don't always play nicely together, and no 802.11G implementations is ever going to deliver 49Mbps of application layer throughput.
 
Yeah it is bound to be fast on phone because the pages are of smaller size for the mobile so at the same internet speed phone would load pages faster, your internet is slow nothing else is the problem!!!
 
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