In the cut-throat battle for carrier supremacy, it is common for networks to diss each other, and T-Mobile’s latest ad is clearly making fun of AT&T’s 3G service as well as the iPhone 4. They also manage to introduce their myTouch 4G phone that is launched today in this Apple-style PC vs Mac ad. Talk about adding insult to injury! T-Mobile’s HSPA+ network reaches up to 4G speeds, and also allow video calling from their myTouch 4G phone from anywhere there is coverage- no WiFi required. Well, it seems that the ball has now been tossed into AT&T’s court. Let’s see if the nation’s iPhone carrier has anything to say about it. Watch the video after the break and leave us your thoughts: