"The President-elect knows, presumably through experience, that whatever texting device the government has decided to provide for his use - even if it meets their "security requirements" - is (a) likely to be slower than what he's got, (b) probably even "buggier" than his current arrangement, (c) more likely to not function due to a battery drain, and (d) because it's not completely under his own personal control, it'll probably be even more prone to "leaks" and "hacks.""