6月18日凌晨，苹果推送了iOS8第二个测试版（Beta2）更新，提供了来电归属地（针对陌生人）功能以及性能提升。详细更新历史，大家可以参考《iOS8 Beta2更新了什么？不止是来电归属地》
可以升级iOS8的设备清单有：
• iPhone4s、iPhone5、iPhone5c、iPhone5s；
• 第五代iPod touch；
• iPad2、Retina屏iPad（即iPad3和iPad4）、iPad Air、iPad mini、Retina屏iPad mini（即iPad mini 2）
苹果iOS8测试版官方下载地址如下：（复制到迅雷即可直接下载）
iPhone5s
iPhone 5s（model A1453，A1533）CDMA
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__iphone_5s_model_a1453_a1533__12a4297e.zip
iPhone 5s（model A1457，A1518，A1526，A1528，A1530）GSM
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__iphone_5s_model_a1457_a1518_a1528_a1530__12a4297e.zip
iPhone5c
iPhone 5c（model A1456，A1532）GSM
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__iphone_5c_model_a1456_a1532__12a4297e.zip
iPhone 5c（model A1507，A1516，A1526，A1529）CDMA
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__iphone_5c_model_a1507_a1516_a1526_a1529__12a4297e.zip
iPhone5
iPhone 5（model A1428）GSM
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__iphone_5_model_a1428__12a4297e.zip
iPhone 5（model A1429）CDMA
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__iphone_5_model_a1429__12a4297e.zip
iPhone 4s
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__iphone_4s__12a4297e.zip
iPad mini Retina（iPad mini 2）
iPad mini Retina（model A1489）WiFi
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_mini_model_a1489__12a4297e.zip
iPad mini Retina（model A1490）CDMA
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_mini_model_a1490__12a4297e.zip
iPad mini Retina（model A1491）GSM
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_mini_model_a1491__12a4297e.zip
iPad mini
iPad mini（model A1432）WiFi
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_mini_model_a1432__12a4297e.zip
iPad mini（model A1454）GSM
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_mini_model_a1454__12a4297e.zip
iPad mini（model A1455）CDMA
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_mini_model_a1455__12a4297e.zip
iPad Air
iPad Air（Model A1474）WiFi
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_air_model_a1474__12a4297e.zip
iPad Air（model A1475）CDMA
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_air_model_a1475__12a4297e.zip
iPad Air（model A1476）GSM
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_air_model_a1476__12a4297e.zip
iPad 4
iPad 4（generation model A1458）WiFi
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_4th_generation_model_a1458__12a4297e.zip
iPad 4（generation model A1459）GSM
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_4th_generation_model_a1459__12a4297e.zip
iPad 4（generation model A1460）CDMA
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_4th_generation_model_a1460__12a4297e.zip
iPad 3
iPad WiFi（3rd generation）WiFi
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_wifi_3rd_generation__12a4297e.zip
iPad 3 WiFi+cellular（model for AT&T）GSM
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_wifi__cellular_model_for_att__12a4297e.zip
iPad 3 WiFi+cellular（model for Verizon）CDMA
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_wifi__cellular_model_for_verizon__12a4297e.zip
iPad 2
iPad 2 WiFi（Rev A）
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_2_wifi_rev_a__12a4297e.zip
iPad 2 WiFi
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_2_wifi__12a4297e.zip
iPad 2 WiFi + 3G（GSM）
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_2_wifi__3g_gsm__12a4297e.zip
iPad 2 WiFi + 3G（CDMA）
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipad_2_wifi__3g_cdma__12a4297e.zip
iPod touch 5
http://adcdownload.apple.com//ios/ios_8_beta_2_mf5r7v/ios_8_beta_2__ipod_touch_5th_generation__12a4297e.zip
