They can't develope cell phones in Robotech, they lost the freakin' protoclture matrix, do you know how wasteful it would be to have tons of cell phones running on protoculture batteries that could go to powering new robotech ships? Besides, walking around with a Protoculture cell phone is akin to painitng a huge target on your forehead. As soon as you turn it on, you're leaving yourself open to attack from Invid, Haydonites, Deciples of Zor, Robotech masters, Cavil's little attack gerbils, robot cats that crackle appart when you look at them funny, giant talking slugs, etc. Plus if the Haydonites activate the reflex descrambler, then everyone carrying the new Black Berry Shadow phone will explode!