AT&T demonstrated surprising hesitancy last week (in public at least) about its business model for its initial 5G deployment. Marachel Knight, SVP of wireless network architecture, told the Mobile Future Forward conference that the operator would launch initial 5G services by the end of next year, but has not yet decided which services to support. The company is vying with Verizon to get 5G into the field, though their approaches are very different. Verizon has been clear that its first deployments will be for fixed wireless access (FWA) only, with mobility to follow later; and it is using its own pre-5G specifications, rather than waiting for official 3GPP standards to be frozen (though it insists its network will be easily…