Even the premium unlimited offer, called Unlimited Plus, which is priced at $145 a month for two lines, will save you $20 a month. Comcast Business Mobile data options
Older plans sometimes allow unlimited data sharing (hotspot) without the 10GB–50GB caps common today. Oldunlimited.com
Users on family plans from the early 2000s often pay significantly less per line than modern "Premium" tiers. Why Carriers Want You to Switch Even the premium unlimited offer, called Unlimited Plus,
Yes, AT&T customers, ditch your old unlimited data plan - CNET Why Carriers Want You to Switch Yes, AT&T
Some legacy plans do not have "deprioritization" thresholds, meaning speeds don't slow down regardless of usage.
Many long-term mobile users cling to "Old Unlimited" plans (often called plans) that were purchased 10 to 20 years ago. These plans often lack the restrictions found in modern contracts. Why People Keep Them