Sprint was clearly up to something good when we noticed LTE in parts of San Francisco. It turns out that this was just the tip of the iceberg -- the carrier has since confirmed that it's also flicking the switch in New York City, parts of New York state, Washington DC, and Florida cities that include Jacksonville, Miami and Tampa. The faster access is going live on a site-by-site basis in given areas rather than all at once, which bears out what we're hearing from readers and a Sprint spokesperson we reached for comment: LTE appe