REFERENCE All About Hardware iPhone 4s with picture

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iPhone 4s Memory Management

-HDD NAND Flash (For OS Storage Serial Number User Data
-NOR Flash (For IMEI)
-Baseband CPU (Hardware ID)





iPhone 4s Error 1 solution


-Check Batt_VCC form U1001_RF to Baseband
-Check BB_HSIC_RDY 1.8v to Baseband CPU





iPhone 4s Error 9


-Jumper Q3




iPhone 4s Error 29


-Check R153,C293,C300





iPhone 4S Error 4013

-Check VDDIO 1.8v for WIFI @ R95_RF
-Check BT RESET 1.8v for WIFI @ R106_RF
-Check BT_Wake 1.8v for WIFI @ R108_RF
-Rehot/Replace IC WIFI U1_RF







iPhone 4S Error 21

-Changed Batt
-Check component short in VBATT line
-Check J7 Connector and sensor flex I2C1





iPhone 4s Error Restoring Proces

-Error 9 (U101 NAND Flash, Q3, CPU A5)
-Error 1 (U4_RF Baseband and supply voltage, U1001_RF, U18_RF)
-Error 47,48 (U4_RF Baseband,U12_RF Serial NOR FLash, IMEI in U12_RF corrupted, Supply Voltage)