[Xperia Z General] SquallATF:
my device is L36h chinese version c6602

New discovery modify ta can change default band config

when I read /nvta_log/log.txt in efs I fond this

0010346 Selecting band configuration file
0010346 Selected band configuration file '/nvpreload/[COLOR="Red"]nv_W12458.bin[/COLOR]'.
0010348 /nvpreload/nv_W12458.bin removed successfully.
0010348 /nvpreload/nv_default_band.bin removed successfully.
0010699 Baseband version 9x15A-ACEFWMAZQ-30110098-75

the I fond many band configuration bin file in m9kefs3 partition same as amss_fs_3 such as nv_L1357_20W1358.bin

next I dump ta use DumpXperiaTA

I fond

Offset: 0x000009C0
Token 0x000009F7, Len = 0x00000007, Magic1 = 0x3BF8E9C1, Magic2 = 0xFFFFFFFF
Hex value:
57313234353800
ASCII value:
[COLOR="Red"]W12458[/COLOR].

and

Offset: 0x0004E7E0
Token 0x0000EA62, Len = 0x00000040, Magic1 = 0x3BF8E9C1, Magic2 = 0xFFFFFFFF
Hex value:
797567615F726F777774725F57313234353800000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000
ASCII value:
[COLOR="Red"]yuga_rowwtr_W12458[/COLOR]..............................................

next I try to change ta setting using flashtool then success switch band config to nv_L1357_20W1358 but rfnv file

and get a full log

0007769 === NV/TA-log start ===
0007769 taks: Received 1559 units
0007769 TA_QMI_SVC: TA QMI Service started and ready...
0007883 EFS2 free: 627 kB
0007883 nvpreload/nv_L1245_17W12458.bin removed successfully.
0007883 nvpreload/nv_L1245_17W12458_cal_true.bin removed successfully.
0007884 nvpreload/nv_L1245_17W12458_ets.bin removed successfully.
0007884 nvpreload/nv_L1_19_21W156_19.bin removed successfully.
0007884 nvpreload/nv_L1_19_21W156_19_cal_true.bin removed successfully.
0007884 nvpreload/nv_L1_19_21W156_19_ets.bin removed successfully.
0007884 nvpreload/nv_W12458.bin removed successfully.
0007884 nvpreload/nv_W12458_cal_true.bin removed successfully.
0007884 nvpreload/nv_W12458_ets.bin removed successfully.
0007885 nvpreload/nv_W1358.bin removed successfully.
0007885 nvpreload/nv_W1358_cal_true.bin removed successfully.
0007885 nvpreload/nv_W1358_ets.bin removed successfully.
0007886 Selecting band configuration file
0007886 Selected band configuration file '/nvpreload/nv_L1357_20W1358_cal_true.bin'.
0007887 /nvpreload/nv_L1357_20W1358_cal_true.bin removed successfully.
0007887 /nvpreload/nv_default_band_cal_true.bin removed successfully.
0007887 Selecting band configuration file
0007887 Selected band configuration file '/nvpreload/nv_L1357_20W1358_ets.bin'.
0007888 /nvpreload/nv_L1357_20W1358_ets.bin removed successfully.
0007888 /nvpreload/nv_default_band_ets.bin removed successfully.
0007933 Loading trim area to NV (<unit> [<size>]):
...................
...................
0009792 Trim area load completed. 1475 items copied, took 1859 ms.
0009792 IMEI: sony_imei_smem: 1073761248
0009792 IMEI: sony_imei_size: 16
0009792 IMEI:
0009792 IMEI:
0009793 Selecting band configuration file
0009793 Selected band configuration file '/nvpreload/[COLOR="Red"]nv_L1357_20W1358.bin[/COLOR]'.
0009795 /nvpreload/nv_L1357_20W1358.bin removed successfully.
0009795 /nvpreload/nv_default_band.bin removed successfully.
0010160 Baseband version 9x15A-ACEFWMAZQ-30110098-75

Warning the following changes might cause your phone is unavailable at your own risk, and backup your ta partition first.

I post a ftf file can change band config to yuga_gltewtr_L1357_20W1358(the c6603 default band config), but also need replace rfnv by you self

I noticed all default rfnv files are read from ta partition, is there any way to delete ta value? so that we can fully switch band by flashtool