T-Mobile will text when it throttles customers

SAN FRANCISCO (KGO) -- Wireless carrier T-Mobile has agreed to let its customers know when they're being throttled.

Throttling is when a company intentionally lowers your data speeds. It usually happens when it thinks you're hogging data or have reached the limits of your plan.

Under the new agreement, T-Mobile users will get a text message when they've reached their data limits.

They'll also be able to use an app that will enable them to find out exactly what their current speed is.