Yes, migrating can be challenging. But with LTE comes broader coverage, shorter latency times, crisper, clearer VoLTE audio and more fluid data streaming. Add to that 10x the data speeds of 3G, simultaneous voice and data access and the time-slashing innovations of intuitive, modern technology. Every day you put off the inevitable is a day you miss out on the power of LTE.
You can't expect new results from old technology. It's time to migrate.