instagram is working, but you need internet for that to work.
mobile net is just average and satisfactory. thats what you get from the device's 7.2mbps HSPA (3G) radio.
speakers are loud, but sound quality is average. even louder when you play music with 3rd party apps such as Winamp or PowerAmp and loaded with Equalizer app.
atleast you get a free headset. hehe