Finding a genuinely unlimited mobile data plan has become increasingly difficult.
AT&T and Verizon no longer offer unlimited plans to new customers. Existing grandfathered unlimited accounts are frequently subjected to dramatic speed reductions once certain monthly thresholds are exceeded, a practice commonly called throttling. T-Mobile still sells unlimited plans, but they also slow customers’ data speeds once a monthly usage cap is reached.
AT&T recently raised its throttling threshold to 3GB for HSPA+ connections and 5GB for LTE, responding to complaints that previously enforced limits—sometimes as low as 2GB—left users with unusable speeds. For the same monthly price, tiered plans could already provide up to 3GB of high-speed data, so this adjustment was aimed at addressing customer dissatisfaction.
Sprint remains the largest carrier still offering truly unlimited plans for new subscribers, but coverage limitations complicate the picture. Outside Sprint’s primary network areas, customers may face a 300MB cap. While Sprint doesn’t reportedly throttle the top 5% of heavy users as aggressively as Verizon and AT&T, some restrictions and coverage trade-offs still apply.
Prospective customers should check local coverage maps and performance reports before choosing a provider. Whether Sprint or any carrier can continue to sustain unlimited plans as overall data consumption rises is uncertain.
Most of the mobile industry now argues that unlimited plans are no longer sustainable. Rapid smartphone adoption and surging demand for mobile web, music, and video are straining network capacity.
This strain is expected to intensify over the coming years. Industry forecasts have repeatedly highlighted explosive growth in mobile broadband subscriptions—driven by both more devices and richer content—and networks will face mounting pressure to scale.
Carriers will need alternatives to blunt throttling that still allow them to manage finite spectrum and infrastructure costs. A likely near-term response is a broader range of tiered plans tailored to different usage patterns: light users, social media-centric customers, and heavy video streamers could each choose plans designed around their most common behaviors. Over time, the market may shift toward more precise metering and per-kilobyte billing for users who prefer pay-as-you-go clarity.
In the meantime, consumers can reduce cellular data consumption by monitoring usage and relying on Wi‑Fi whenever possible. Modern smartphones include tools to help: recent Android releases let users set data warnings and hard caps to prevent overages, and similar third-party apps exist for other platforms.
However, overall data demand continues to grow and shows no sign of slowing. To accommodate these increases while keeping plans affordable, carriers will have to invest heavily in network capacity and adopt smarter traffic management strategies.
Ultimately, unless major technological or business-model changes occur, truly unlimited mobile data plans appear increasingly unlikely to remain common.