Does iPhone error 4013 mean the NAND is bad?

Not necessarily. Apple describes 9, 4005, 4013 and 4014 as the device disconnecting during the update and lists software steps first. In a solved repair case the cause was a compass IC, not the NAND.

Can data be recovered by moving an iPhone NAND to another board?

No. Apple ties the file-system keys to a UID fused into the SoC, so storage moved to another device is inaccessible.

Why does an iPhone fail activation after a NAND replacement?

The NAND holds SysConfig (serial number, Wi-Fi MAC and Bluetooth MAC). A replacement NAND without the original SysConfig fails activation; it must be read from the original and written back.

iPhone NAND Repair: Error 4013 / 4014, ANS2 Panic, SysConfig, Data Loss

01

NAND checker: symptom to next step

Pick the model and the symptom, answer the bench tests you have done. The result updates as you answer and lists its sources.

iPhone modelSymptom

02

What each storage symptom points to

Restore or update fails with error 9, 4005, 4013 or 4014 — Apple describes these as the device disconnecting during the update. Do Apple's steps first. On the bench, 4013 is not always the NAND: in a solved iFixit iPhone 5 case the fault was a compass IC.
Source: Apple Support - If you see error 9, 4005, 4013 or 4014 when you restore your iPhone · iFixit Answers - iPhone 5 error 4013 and NAND error (solved: faulty compass IC)
Restore fails with an Apple “Check your hardware” error (1, 3, 11, 12, 13, 16, 20, 21, 23, 26 to 29, 34 to 37, 40, 56, 1002, 1004, 1011, 1012, 1014, 1667, 1669) — Apple says these errors mean you might have a hardware issue. NAND is one candidate among several; record the restore stage and current draw.
Source: Apple Support - iOS update and restore errors
Panic log names ANS2 (Apple NAND storage) — ANS2 panics point to the NAND or its communication lines. Update / DFU restore first; if it persists, NAND or its lines need microsoldering.
Source: iFixit - iPhone Kernel Panics (ANS2 = NAND storage)
After NAND work: serial shows XXXXXXXX or a random number, random Wi-Fi / Bluetooth MAC, activation fails — SysConfig (serial number, Wi-Fi MAC, Bluetooth MAC) lives on the NAND. A replacement NAND without the original SysConfig fails activation.
Source: Repair Wiki - How to recover original SysConfig data from iPhone (6 to 11 Pro Max)
Customer wants the data back from a dead board or a removed NAND — Apple ties the file-system keys to a UID fused into the SoC: if the storage is moved to another device, the files are inaccessible. Data can only come from the original board working again.
Source: Apple Platform Security - The Secure Enclave (UID fused into the SoC; moved storage is inaccessible)

03

Bench tests in order

Test	If yes	If no	Source
Apple's steps done: computer updated, force restart, Update tried first, another cable and another computer?	—	Do Apple's steps first: these errors are usually a lost USB connection.	Source: Apple Support - If you see error 9, 4005, 4013 or 4014 when you restore your iPhone
Does the computer detect the phone in recovery or DFU mode?	—	Not detected: work on the USB / charge-port path before the NAND (Apple lists separate USB-connection errors).	Source: Apple Support - iOS update and restore errors
Settings › General › About shows the real serial number (not XXXXXXXX or random)?	—	SysConfig is missing or corrupt: recover the original serial, Wi-Fi MAC and Bluetooth MAC.	Source: Repair Wiki - How to recover original SysConfig data from iPhone (6 to 11 Pro Max)
Has a clean update / DFU restore been tried after the panic or error?	—	Update / DFU restore first, before any NAND work.	Source: iFixit - iPhone Kernel Panics (ANS2 = NAND storage)

04

Repair routes

NAND or its lines (after a clean restore)

Tools: Microsoldering station and a NAND programmer with the module for this model's NAND package (BGA60 / BGA70 / BGA110 / BGA315).

Update or DFU restore first; go to the NAND only if the fault persists.
Before removing anything, read and back up the original SysConfig (serial, Wi-Fi MAC, Bluetooth MAC) with the programmer. A NAND without it fails activation.
Reheating a corrupted NAND does not fix it: it has to be removed, cleaned, reprogrammed and soldered back. The CPU sits beside the NAND and overheats easily: work with care.
Write the original SysConfig to the programmed or replacement NAND, solder it, then restore and activate.

Limits

User data is lost with a NAND replacement: files on moved storage are inaccessible by Apple's design.
The reviewed programmer listings stop at iPhone 15 Pro Max (BGA315); support for iPhone 16 and later is not stated.

Source: iFixit - iPhone Kernel Panics (ANS2 = NAND storage) · Repair Wiki - How to recover original SysConfig data from iPhone (6 to 11 Pro Max) · iFixit Answers - iPhone 5s error 4013/2015: can the NAND just be resoldered? · Apple Platform Security - The Secure Enclave (UID fused into the SoC; moved storage is inaccessible) · i2C P15 Pro NAND programmer listing (BGA60 / BGA70 / BGA110 / BGA315 by iPhone model)

Recover the original SysConfig

Tools: Hot air, soldering iron and a JCID programmer; the JCID P13 reads and writes SysCfg without dismantling on iPhone 8 to 13 Pro Max.

Traditional route (iPhone 6 to 11 Pro Max): remove the original NAND, read the original serial, Wi-Fi MAC and Bluetooth MAC with the programmer, write them back, reinstall.
iPhone 8 to X: purple-mode direct recovery pulls the original SysConfig without repeated desoldering.
Verify the serial and both MAC addresses in Settings before activation.

Limits

Write only the phone's own original SysConfig. Changing identifiers is not a repair.

Source: Repair Wiki - How to recover original SysConfig data from iPhone (6 to 11 Pro Max) · JCID - P13 NAND programmer (SysCfg read/write, purple screen, iPhone 8 to 13 Pro Max)

05

After the repair: verify before handing over

Restore completes and the phone activates.
Settings › General › About shows the real serial and the expected capacity.
Wi-Fi and Bluetooth work.
Restart several times; no new panic in Analytics Data.
Save the case dossier below with the route used and the result.

Source: Repair Wiki - How to recover original SysConfig data from iPhone (6 to 11 Pro Max)

06

Board-level method (restore and USB path ruled out)

Use this after a clean restore attempt and with the USB path confirmed.

Inspect the NAND area for liquid, corrosion and heat damage from earlier work.
Diode mode on the NAND supply and data lines named in the boardview of this exact board; compare with a known-good board of the same model, never a generic number.
Powered: measure the NAND supplies during the restore attempt; a missing supply with its source present points to the parts between them.
Read and back up SysConfig before any NAND removal.

AIFlasher does not publish NAND rail voltages, diode values or designators until they are sourced for the exact board. Record your own known-good readings in the dossier.

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