How to tweek internet speed on PSN (for COD on PS3)

I basically want to know how can I improve my internet speed to play Call of Duty Black Ops 4 on PS3 online? Everything below is just a case study for all the tech experts around.

I am using a DSL 4MB package with a ****** 54 G router. The speed test on my laptop over wifi shows the following stats:

Ping: 24 ms Download Speed: 3.39 Mbps Upload Speed: 0.85 Mbps

Now when I do a connection test on PS3 it gives the following stats:

Download Speed: 1.01 Mbps (and lower) Upload Speed: 0.40 Mbps (and lower)

Help needed