Reception is pretty good...no real complaints there, though in my area I get either H or EDGE, very rarely do I see 3G.
The speakerphone is touch and go...mostly go. I've had a couple of calls that were plenty loud (though tinny - treble sucks), and a few that were just barely audible. I think it also has to do with the other party's reception and phone. The quality definitely isn't great, but if it's loud enough then it's sufficient.
Regular call reception & clarity is just fine.
Beyond that, the MT4G is a bad@ss phone in all other regards...I wouldn't even consider the G2 in comparison unless you just HAVE to have a physical keyboard. There's no other phone in TMob's lineup that can hold a candle to the MT4G, or hardly any other phone in the market, period.
The speaker quality being sub-par is a small price to pay for everything else this thing can do.
myTouch 4G/HTC Glacier (Black)
HBoot: 0.85.2007 (PD1510000)
Recovery: ClockworkMod 18.104.22.168
Current ROM: Virtuous Fusion MT4G :: GingerSense 3.0/3D
Tested: CM6.1 Alpha+gr8gorilla's OC+DarkFroyo; Iced Glacier, eViL's 4G-Z, CM7, RoyalGinger, RoyalGlacier