This includes pager services, but the use of pagers is on the decline. In January 2001, an e-mail alert service for text-based digital cellphones and pagers was launched. RIM began to advertise these devices as email-capable mobile phones rather than as two-way pagers. They may be left as messages on voicemail systems or pocket pagers. Yulong at first was a maker of pagers and paging systems. However, the split was hastened by the proliferation of cell phones and pagers. The split came about mainly due to the proliferation of cell phones and pagers. He expanded the crew's gambling operations by introducing the use of pagers and cell phones. In addition, some systems implement wireless pagers and electronic signature-capture devices. This new service featured personalized web content, news alerts to pagers and Java chat. FLEX is a communications protocol developed by Motorola and used in many pagers. Mobile code "696" is assigned to OTE pagers. Local numbers are portable, with few limited exceptions for specific services such as pocket pagers. POCSAG is an asynchronous protocol used to transmit data to pagers. Characters also use pagers, hair mousse, and portable CD players.