How to fix this iPhone 5 error NAND?

Today I found that my iPhone has this problem, any idea hot to fix it?!

This is what is written on the screen.

[NAND ] _FindFlashMediaAndKeepout:601 physical nand block offset 1
[NAND ] start:356 this 0x9f538400 PROVIDER=0x9f6b1f00 flashMedia=0x9f6b1f00
[NAND ] WMR_Start: 149 Apple PPN NAND Driver, Read/Write
[NAND ] WMR_Start: 174 FIL_Init [OK]
[NAND ] WMR_Open: 371 VFL_Open [OK]
[NAND ] s_cxt_boot: 88 sftl: error, unclean shutdown; adopted 11280 spans
[NAND ] WMR_Open: 420 FTL_Open [OK]
[NAND ] _publishServices: 642 FTL capabilities: 0x00000001
[NAND ] _ppnvflGetStruct: 3469 Checking borrowed blocks - count: 23 max_count: 23
[NAND ] _fetchBorrowedList: 881 number of borrowed blocks 16

I have the same thing with the 4s phone that had no issues in the past year. Most likely it is a bad battery or it is an issue with the front camera/sensor. Apparently the wiring to the sensor/camera can get damaged easily.

I would be leery of following the suggestions of the apple support team. I did that and now my phone is locked in the recovery except the recovery won't fix it. The chat team tried telling me that the issue is because apple doesn't support flash programming and it was something I did with my phone. They are idiots. If you have the apple icare, go get it replaced. That is what I'm doing

NAND refers to the type of flash memory. There are two types, NAND and NOR. NAND is cheaper, and therefore more common.

You have a partitioning, or memory hardware problem.

If the problem is with partitioning, usually some form of JTAG is required to fix it. If your problem is hardware, it is unlikely that you can fix it.

Beyond that I do not know the specifics of the iPhone.