ลิงก์ตรงโหลดแรงจากแอปเปิล iOS 11.2.1 สำหรับ iPhone, iPod, iPad ดาวน์โหลดที่นี่

สำหรับใครที่ต้องการติดตั้ง iOS 11.2.1 ด้วยโปรแกรม iTunes สามารถดาวน์โหลดไฟล์ ipsw เพื่อไปติดตั้งจากด้านล่างนี้ได้ครับ

iPhone

iPhone_4.0_64bit_11.2.1_15C153_Restore.ipsw
11.2.1 (5s GSM+CDMA): iPhone_4.0_64bit_11.2.1_15C153_Restore.ipsw
11.2.1 (6+): iPhone_5.5_11.2.1_15C153_Restore.ipsw
11.2.1 (6): iPhone_4.7_11.2.1_15C153_Restore.ipsw
11.2.1 (6s): iPhone_4.7_11.2.1_15C153_Restore.ipsw
11.2.1 (6s+): iPhone_5.5_11.2.1_15C153_Restore.ipsw
11.2.1 (SE): iPhone_4.0_64bit_11.2.1_15C153_Restore.ipsw
11.2.1 (7 GSM+CDMA): iPhone_4.7_P3_11.0_11.2.1_15C153_Restore.ipsw
11.2.1 (7+ GSM+CDMA): iPhone_5.5_P3_11.0_11.2.1_15C153_Restore.ipsw
11.2.1 (7 GSM): iPhone_4.7_P3_11.0_11.2.1_15C153_Restore.ipsw
11.2.1 (7+ GSM): iPhone_5.5_P3_11.0_11.2.1_15C153_Restore.ipsw
11.2.1 (8 GSM+CDMA): iPhone_4.7_P3_11.0_11.2.1_15C153_Restore.ipsw
11.2.1 (8 Plus GSM+CDMA): iPhone_5.5_P3_11.0_11.2.1_15C153_Restore.ipsw
11.2.1 (X GSM+CDMA): iPhone10,6_11.2.1_15C153_Restore.ipsw

iPad

11.2.1 (iPad Air Wi-Fi): iPad_64bit_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Air Cellular): iPad_64bit_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Mini 2 Wi-Fi): iPad_64bit_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Mini 2 Cellular): iPad_64bit_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Air China): iPad_64bit_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Mini 2 China): iPad_64bit_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Mini 3 Wi-Fi): iPad_64bit_TouchID_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Mini 3 Cellular): iPad_64bit_TouchID_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Mini 3 China): iPad_64bit_TouchID_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Air 2 Wi-Fi): iPad_64bit_TouchID_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Air 2 Cellular): iPad_64bit_TouchID_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Mini 4 Wi-Fi): iPad_64bit_TouchID_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Mini 4 Cellular): iPad_64bit_TouchID_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Pro Wi-Fi): iPadPro_12.9_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Pro Cellular): iPadPro_12.9_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Pro 9.7 Wi-Fi): iPadPro_9.7_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Pro 9.7 Cellular): iPadPro_9.7_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad 5 Wi-Fi): iPad_64bit_TouchID_ASTC_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad 5 Cellular): iPad_64bit_TouchID_ASTC_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Pro 12.9 Wi-Fi 2nd Gen): iPad_Pro_HFR_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Pro 12.9 Cellular 2nd Gen): iPad_Pro_HFR_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Pro 10.5 Wi-Fi): iPad_Pro_HFR_11.2.1_15C153_Restore.ipsw
11.2.1 (iPad Pro 10.5 Cellular): iPad_Pro_HFR_11.2.1_15C153_Restore.ipsw

iPod 

11.2.1 (6G): iPodtouch_11.2.1_15C153_Restore.ipsw