T-Mobile doesn't seem to have
a "Connection Optimizer" feature in its line of phones. In T-mo's
case the feature that needs to be disabled is the "Wi-Fi Manager".
To disable this feature you need to do the following:
Access your T-Mobile account (for me I just press on the "T-Mobile
My Account" App).
Press the menu button on your device, then select "Options".
Under "Notifications" uncheck the box marked "Display Wi-Fi
Under "Connection Assistant" select "Open Wi-Fi manager".
Uncheck the box for "Manage Wi-Fi Connections".
I talked to T-mobile tech support about an unrelated issue and
offhandedly mentioned this problem. The rep informed me that this
was a known issue and stated that this issue was being addressed.
In the mean time disabling the "Wi-Fi Manager" is a temporary fix
to address this problem. Here is the shorthand way to disable the
T-Mobile My Account (app) -> Menu -> Options -> "Display Wi-Fi Manager
Notifications" (Uncheck) -> "Open Wi-Fi Manager" (under
"Connection Assistant") -> (Uncheck) "Manage Wi-Fi Connections".