Mobile Beacon and Mobile Citizen, said that the network shutdown violates the contract which requires Sprint to provide high-speed internet services for low-income families and public institutions, as most of the equipment was still not LTE-compatible. Sprint pledged to provide upgrades to the equipment and work out a solution with the groups as soon as possible. Most of the WiMax network not running in the affected areas were shut down. On February 1, 2016, the same court declared that Sprint can proceed with the network shutdown in the remaining 75 cities. Sprint took the network of 16 cities, including New York City, offline on February 2, 2016, and closed 39 more on February 29, 2016. On March 31, 2016, the last 25 cities' networks were shut down. Controversies Device unlocking For devices launched after February 15, 2015, Sprint unlocked phones when Lease/Service/Billing Agreements were satisfied and accounts were in good standing. For devices launched before February 15, 2015, Sprint did not authorize the use of GSM-capable devices, including both phones and tablets it sold, on a United States-based competitor's network, such as T-Mobile or AT&T. Unlike the aforementioned companies, which have comparatively lenient policies about unlocking phones, such as when the device is paid off or the contract is fulfilled, and Verizon, whose GSM-capable devices ship with the GSM portion already unlocked, Sprint only unlocked devices for international use for customers in good standing after contacting customer support. This limitation meant phones and tablets sold by Sprint that were launched prior to February 15, 2015, only lawfully functioned on the Sprint network, a policy that prevented what may have otherwise been compatibility with another carrier's network. Additionally, iPhones sold by Sprint generally had the lowest resale value of devices sold by the top four carriers in the US. Means to unlock a GSM-capable iPhone existed, such as using a SIM interposer, but the device may not have functioned fully or correctly on the desired network, and unlocking of the device was a violation of the law under the terms of the DMCA up until August 1, 2014, when President Obama signed into law a bill allowing the unlocking of cell phones. FCC fine over Do Not Call rule breaches In May 2014, the company was fined $7.5 million by the U.S. Federal Communications Commission for failing to honor consumer requests to opt-out of marketing messages delivered by phone and text