【正文】 ..................................................................................................... 176地圖疑難解答................................................................................................... 178BlackBerry Messenger........................................................................................... 179聯(lián)系人......................................................................................................... 179組............................................................................................................. 180對話........................................................................................................... 181狀態(tài)........................................................................................................... 184應(yīng)用程序....................................................................................................... 185切換應(yīng)用程序................................................................................................... 185使用應(yīng)用程序中心添加、更新或降級應(yīng)用程序....................................................................... 185添加應(yīng)用程序................................................................................................... 185查看應(yīng)用程序的屬性............................................................................................. 185刪除第三方應(yīng)用程序............................................................................................. 185在添加應(yīng)用程序之前接收設(shè)備密碼提示............................................................................. 186查看應(yīng)用程序數(shù)據(jù)庫的大小....................................................................................... 186檢查應(yīng)用程序更新............................................................................................... 186關(guān)于升級 BlackBerry Device Software............................................................................ 186前提條件：通過無線網(wǎng)絡(luò)升級 BlackBerry Device Software.......................................................... 186升級 BlackBerry Device Software................................................................................ 187返回到 BlackBerry Device Software 的上一版本................................................................... 187刪除 BlackBerry Device Software 之前的版本..................................................................... 187應(yīng)用程序疑難解答............................................................................................... 187無線網(wǎng)絡(luò)覆蓋................................................................................................... 189查找有關(guān)無線覆蓋指示符的信息................................................................................... 189關(guān)閉無線連接................................................................................................... 189網(wǎng)絡(luò)連接指示符................................................................................................. 189打開無線覆蓋通知............................................................................................... 190更改無線網(wǎng)絡(luò)的連接速度......................................................................................... 190關(guān)于首選無線網(wǎng)絡(luò)列表........................................................................................... 190在首選網(wǎng)絡(luò)列表中添加網(wǎng)絡(luò)....................................................................................... 190更改首選無線網(wǎng)絡(luò)的順序......................................................................................... 191從首選無線網(wǎng)絡(luò)列表中刪除無線網(wǎng)絡(luò)............................................................................... 191關(guān)閉數(shù)據(jù)服務(wù)................................................................................................... 191關(guān)于漫游....................................................................................................... 192手動切換無線網(wǎng)絡(luò)............................................................................................... 192確定網(wǎng)絡(luò)連接和服務(wù)狀態(tài)......................................................................................... 192無線網(wǎng)絡(luò)覆蓋疑難解答........................................................................................... 192電源、電池和內(nèi)存............................................................................................... 193關(guān)閉設(shè)備....................................................................................................... 193將設(shè)備設(shè)置為自動打開或關(guān)閉..................................................................................... 193復(fù)位設(shè)備。..................................................................................................... 193檢查電池電量................................................................................................... 193延長電池壽命................................................................................................... 193格式化設(shè)備內(nèi)存或媒體卡......................................................................................... 194查看可用內(nèi)存量................................................................................................. 194最佳實(shí)踐：優(yōu)化設(shè)備性能......................................................................................... 194SIM 卡......................................................................................................... 195關(guān)于 SIM 卡電話簿.............................................................................................. 195在 SIM 卡中添加聯(lián)系人.......................................................................................... 195將聯(lián)系人從 SIM 卡復(fù)制到聯(lián)系人列表.............................................................................. 195將聯(lián)系人從聯(lián)系人列表復(fù)制到 SIM 卡.............................................................................. 195更改 SIM 卡聯(lián)系人.............................................................................................. 196刪除 SIM 卡聯(lián)系人.............................................................................................. 196在 SIM 卡上存儲短信............................................................................................ 196關(guān)于 SIM 卡安全性.............................................................................................. 196通過 PIN 碼保