Connection Manager errors (or DUN errors) display when there are problems connecting to the T-Mobile network. Learn how to troubleshoot these errors below.
Scroll to the error for steps to fix the problem.
'The port was/is disconnected'
This error is happens when your account is suspended or if you have low signal.
To resolve this error, restart your computer and try to connect. If you have no signal or only 1 bar, try moving location to another room or closer to a window. If the above steps do not resolve your issue, contact T-Mobile Customer Service.
650, 651, 652
'The Remote Access server is not responding'
'Your modem has reported an error'
'Unrecognized response from the device'
To resolve this error, follow these steps:
This error happens when you're not in T-Mobile coverage, signal is too low, or your computer does not meet the minimum system requirements.
To resolve this issue, follow these steps:
This error is specific to the Rocket 4G and happens if your SIM card is not properly inserted in the USB laptop stick, or if the laptop stick doesn't recognize the SIM card. This can also happen if there is a problem with the Connection Manager.
This error is specific to the Rocket 4G and happens if your computer does not meet the system requirements or if your computer does not recognize the modem. It can also happen if you're using a docking station or USB, or if your computer is turning off USB devices to save power.
"Searching For Wireless Device"
"No Wireless Device"
"No network available" (Mac OS X)
This error is specific to the Rocket 4G and happens because of the following:
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