Japan, so foreign buyers are dependent on their chosen reseller to handle repairs, usually by sending to their agent in Japan who acts as if the device was owned and used in Japan in order to have it repaired by Sharp, before sending it back to the owner. Whilst Zauruses are actually quite robust devices, due to their miniaturization they are not easily repairable by casual electronics hobbyists. In January 2007, it was reported that Sharp would discontinue production of the Zaurus line after February 2007. Later, in March, a European supplier tried to buy a batch of Zauruses as demand was still strong and noticed that they were all manufactured after Sharp's original cut-off date, however, Sharp was not able to explain its plans. Their later units were the WS003SH and WS004SH which, whilst adding wireless and cellular phone and data features, ran the Windows Mobile 5.0 operating system/application suite. Models Personal Information (PI) series Pi² T, proof of concept model presented in April 1992 PI-3000, the first model, introduced to the Japanese market on October 1, 1993 PI-4000/FX, second generation with ink and fax capabilities, on sale in Japan June 1994 PI-5000/FX/DA, first model capable of syncing data to a personal computer, going on sale in November 1994. PI-4500, introduced in January 1995 PI-6000/FX, featuring a new handwriting recognition software, on sale in Japan August 1995. PI-6000DA, adding a digital adapter for cellular phones, introduced on December 12, 1995 PI-7000, dubbed AccessZaurus (アクセスザウルス) sports a built in modem, is introduced in February 1996. Note: Confusingly, Sharp made another unit called the "PI-7000 ExpertPad", which was a Newton based device, not a Zaurus. PI-6500, was introduced to the Japanese market with a list price of 55,000 Yen on November 22, 1996. Measuring 147x87x17 mm and weighing 195 g including the batteries, it sports a 239x168 dot matrix display and 715 KB of user addressable memory. PI-8000, went on sale on January 24, 1997 with a list price of 80,000 Yen. It featured a 319x168 dot matrix display, 711KB user addressable memory, measuring 157 x 90 x 17 mm, and weighing 215 g including batteries. PI-6600, the last AccessZaurus with a 239 x 168 dot matrix display, measuring 147 x 87 x 17 mm and a weight of 195 g including batteries. It went on sale in Japan on September 25, 1997. K-PDA (ZR) series ZR-3000, 320x240 touch screen, 1