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Extreme speed customer, internet spikes from 250 mbps to under 4 mbps frequently. What can I do?

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Extreme speed customer, internet spikes from 250 mbps to under 4 mbps frequently. What can I do?

what can be causing an issue like this?

 I've tried 2 different modems and 3 different routers.

If I schedule a technician visit, what can I do to make sure they wont charge me 60$ for the visit?  

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Expert

Re: Extreme speed customer, internet spikes from 250 mbps to under 4 mbps frequently. What can I do

Start here: troubleshooting guide. If you still need help, please post your equipment details (make/model of your modem/gateway/router) and a screenshot of your signal levels and your error/event log. Thank you!

"Keepin' it clean since '09" --I am not a Comcast employee.
Official Employee

Re: Extreme speed customer, internet spikes from 250 mbps to under 4 mbps frequently. What can I do?

Hi, hangchi - If you still experience an issue with the speed, please send me a message with your full name, the account holder's name as it listed on the billing statement, a phone or an account number. Click on my name ComcastElla, then click Private Message Me.