I get the feeling that a lowly software engineer somewhere in the bowels of T-Mobile's corporate headquarters is feeling even lower tonight. After a recent update to the often mandatory T-Mobile MyAccount Android app, users started noticing periodic ads appearing in the Android notification bar. T-Mobile customers were, to put it mildly, ticked. The story hit the tech media after threads on T-Mobile's support forums and Reddit reached into the hundreds. Now T-Mobile seems to have seen the error of its ways, apologizing for the "mistake" and saying that it won't happen again.