1Gbps Upgrade Causing Weak & Unstable Wi-Fi on Multiple Devices

I recently upgraded my Xfinity internet to 1Gbps, and since then, I’ve been experiencing constant connectivity issues with some of my devices—issues I never had before.

Devices Affected:

• Apple Devices (iPhone, iMac, iPad) → Frequently disconnecting or showing weak/fair Wi-Fi signal.
• Android TV Box → Also had similar issues at times.

Troubleshooting Done:

1. Xfinity App "Test Your Whole Home Network" Results:
   • iPhone → Weak Wi-Fi
   • iMac → Fair Wi-Fi
   • iPad → Weak Wi-Fi
     
     
2. Technician Visit (1 week after install):
   • Mentioned something about loose cables and an old DirecTV cable possibly causing interference.
   • Issues persist despite this check-up.
     
     
3. Wi-Fi Reset & Router Placement:
   • Reset the router multiple times.
   • No significant changes in device locations.
   • Never had this issue before the upgrade.

At this point, I don’t know if this is a hardware issue with the gateway, a Wi-Fi interference problem, or something else. The fact that Apple devices consistently show weaker Wi-Fi signals makes me wonder if it’s a compatibility issue.

Has anyone else experienced Wi-Fi stability issues after upgrading to 1Gbps?

Thanks