That claim did not sit well with Verizon, who has often used the same 'most reliable' claim. Today, Verizon has responded with a full paged ad, citing it has spent over $7 billion annually to build and maintain their network. The carriers also notes that it's achieving the most awards by RootMetrics for top overall call, text and data performance.
Others have tried to claim reliability. But to us it's not a hollow claim. Or a slogan. Or a fancy ad campaign.
Verizon never directly disputes AT&T but rather wants to let the consumer to make the ultimate decision.