Since recently moving to Koodo from Rogers I have noticed quite lower response time on my phone especially in downtown Toronto.

@Robdude96 are you seeing this in comparing speed test results?  While speed tests can be fun for bragging rights, a lot of times big differences you see in test results don’t really pan out in day to day use, similar to how hardware benchmarks you see in device reviews give you a synthetic view of relative performance that you may or may not ever notice in real life usage.

I’m not saying speed tests have no practical value.  If on the other hand you’re seeing actual noticeable degraded performance, they can be helpful to confirm that there is an issue rather than just perception.  Are you noticing real-world differences?  

Actually come to think of it: you said you were a Rogers customer previously, right (and not Fido, Rogers 2nd tier and Koodo equivalent)?  If so, and depending on your phone model and plan, you may have had access to their 5G network in at least some locations.  I’m 99% sure that Koodo (and probably Fido and Virgin Plus, the competitors’ 2nd tier brands) only offer up to 4G LTE access and not 5G.  It’s possible this could explain some degraded performance, maybe?  If so, it’s not really an apples to apples comparison. 

EDIT: confirmed that all current Koodo plans offer 4G LTE data (except the “basic” plans that includ throttled 3G-like speeds), and that Fido does not offer access to the Rogers 5G network either.  So if you were on Fido before, you should get a similar experience here, whereas if you were on the 1st tier Rogers network, you likely had 5G data at least some of the time. (As you would also at 1st tier Telus and Bell brands).