stop. If, on the other hand, there is congestion in a particular instance, the bus may become filled by packets in a PBE state before any BE packets can get on. In that situation, the BE packets would have to wait for the next bus that is not filled by PBE packets". US cell phone ISP's have also increasingly resorted to bandwidth throttling in their networks. Verizon and AT&T even applied such throttling to data plans advertised as "unlimited", resulting an FCC complaint against Verizon. Though AT&T had told its customers throttling was a possibility, the FTC filed a lawsuit against the company in 2014, charging that the disclosure was insufficiently specific. A nation-wide study of video streaming speeds in 2018-2019 found major wireless carriers throttling a majority of the time, including when traffic was light, and with significant discrepancies between video services. Uruguay Antel has a state-enforced monopoly forcing consumers who require non-wireless Internet access (i.e. ADSL or fiber – cable Internet is outlawed) to purchase it directly from Antel. Its practices provide insight into the probable behavior of ISPs in markets that have little or no competition and/or lack balancing regulations in the interest of consumers. All of Antel's Internet access plans for consumers are either capped or throttled. Capped plans are typically marketed under the brand "flexible". On such plans once a user reaches a data tier (e.g. 5 GB) additional data usage is billed at a rate of approximately 5 $US/GB. Once a second tier is reached (e.g., 15 GB), Internet services are suspended until the start of the next billing cycle. Throttled plans are typically marketed under the brand "Flat Rate" (for ADSL) and "Vera" (for fiber.) Such plans allow full bandwidth on the connection (e.g. 20 Mbit/s down on the Vera fiber plan) from the beginning of the billing month but are restricted to a percentage of the contracted transmission rate (e.g., to 2Mbit/s down, or 10% of the advertised speed) once a data tier (e.g. 150 GB) is reached. Full bandwidth capability is restored at the beginning of the next billing month. Metrics for ISPs Whether aimed at avoiding network congestion or at pushing users to upgrade to costlier Internet plans, the increasingly common capping and throttling practices of ISPs undoubtedly have an effect on the value proposition of the plans they offer. For consumers to be able to make an informed decision