@WSteeleNYC Why do you want to downgrade the firmware? I believe the new official firmware has enhanced device security, I don't suggest downgrading to older versions.

@JIFourie Are there any differences that you can observe for the wireless network settings on all these three routers? Such as Channel, channel width, and security type. If you believe there is...

@AbdulAziz_22 What is the model number of the TP-Link router? Some models such as AX73 and AX4400 do support setting a bandwidth limit for the Guest Network. You can read this thread: Bandwidth...

@RoninOne I guess you are reporting the same issue as this thread, check Kevin's reply.

@dooug.monteiro Where is the router? Maybe try an open space, then check the signal strength again. Go through the FAQ below to see if you can change other parameters: How to place your wireless...

@libra.sen If this is a newly purchased router and you cannot connect it to your network, please check the below: Do you have internet access when you connect a computer directly to the ISP modem? I...