How telecom services actually sell in Thailand
Two gates, not one: can you reach it and are you allowed in
Technical coverage is only half the answer. A condominium may sit inside your footprint and still be unavailable because the juristic office has not granted access, or has an arrangement with another provider. Treating permission as a separate recorded fact, held against the building rather than the customer, is what prevents a technician arriving to a locked riser and a disappointed household.
Informal first contact, formal corporate purchase
Households and small offices enquire on LINE or a Facebook page and expect a fast, friendly answer. Factories and corporate offices buy through a numbered quotation, internal circulation and a purchase order issued against a specific revision. The same provider needs both motions, and they fail in different ways when run on a single board.