08-26-2019 10:19 AM
I have Internet 100 and my download speed has been down from around 100 Mbps to 40s - 50s Mbps range since yesterday. My upload speed is still fast (120 Mbps). I tried to reset the modem, but it didn't help. Could you please help what I can do?
Solved by: Go to Solution.
08-27-2019 12:13 PM
Thanks for reaching out! We'd be glad to help you get your internet speeds working properly.
We see that you've already tried rebooting, so we'd recommend making sure that there isn't anything interfering with your speeds. You can check out our support page on Optimizing Internet Speeds for detailed steps and solutions to maximize internet efficiency.
Let us know if this helps!
Ramses, AT&T Community Specialist
08-27-2019 7:45 PM
Thank you for the reply.
I checked the link you mentioned but couldn't find anything to help me restore the speed.
I am just using my notebook computer and cell phone for Internet connection and nothing else (no streaming of any sort).
I just did the speed test again and the download speed is 33.8 Mbps and the upload is 124.7 Mbps.
I would appreciate it very much if you can come up with any other suggestions.
08-28-2019 5:31 AM
You may want to check to see if the firmware for your router is up to date. You can also try switching Wi-Fi channels.
We also recommend running diagnostics with the Troubleshoot and Resolve Tool. It's more thorough than a simple router reset and help pinpoint exactly what's causing the drop in download speed.
Let us know what you find!
Aminah, AT&T Community Specialist
08-28-2019 1:46 PM
Thank you for your help.
Trying to switch WiFi channels is a bit overwhelming to me.
I tried the Troubleshoot and Resolve Tool but it didn't really help.
I'm beginning to doubt how reliable the AT&T speed test is.
I just checked my speed again and it says the download speed is 22 Mbps and the upload speed is 128 Mbps. Then I went to a different speed test site where it says the download speed is 118 and the upload is 89.
08-28-2019 2:11 PM
Hi There @Chika-chan,
Thank you so much for trying out prescribed troubleshooting. Since the troubleshooting did not work, we need to look at this from a different direction.
So we are going to send you a private message(PM) to your forums inbox. Please reply to that message with the information requested.
Thank you for being an AT&T Subscriber,
Matthew, AT&T Community Specialist
08-29-2019 10:43 AM
I was able to resolve the problem on my own.
Last night, I received an automatic prompt to update my Windows 10, and updating Windows simply corrected the problem.