Yes but there is a world outside of America. GSM for example came from Finland, and I believe that ARPANET et al were military and wouldn't give a shit about w

Yes but there is a world outside of America. GSM for example came from Finland, and I believe that ARPANET et al were military and wouldn't give a shit about what AT&T were doing, and even then the inventor of packet switching networks (Donald Davies) was from the UK. If AT&T had just carried on I am sure that the internet and mobile phones would have happened anyway. Sure things may have been different it happened at different times, but I don't think AT&T not being broken up would have stopped things that were already happening elsewhere from continuing to happen.