[Sony Cross-Device General] munjeni:
You no need any fw, just perform those few commands while your phone is in flash mode. For example this is how it look on my xperia 10, it display current customisation, customisation history and bootloader version, probably I can implement new feature in newflasher to always write current customisation, so if you willing to help I can make test builds

C:\Users\homepc\Desktop\New folder (5)>newflasher Read-TA:2:2202
--------------------------------------------------------
newflasher v36 by Munjeni @ 2017/2020
--------------------------------------------------------

Determining available free space by GetDiskFreeSpaceEx:

Available space to caller = 321026 MB
Total space on current drive = 837260 MB
Free space on drive = 321026 MB
Device path: \\?\usb#vid_0fce&pid_b00b#5&521a615&0&1#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Class Description: SOMC Flash Device
Device Instance Id: USB\VID_0FCE&PID_B00B\5&521A615&0&1

Writing command: Read-TA:2:2202
got first reply[0xC]:

00000000 44 41 54 41 30 30 30 30 30 30 31 35 DATA00000015

data_buf[0x15]:

00000000 31 33 31 38 2D 36 31 32 30 5F 35 33 2E 31 2E 41 1318-6120_53.1.A
00000010 2E 33 2E 33 34 .3.34

replied[0x4]:

00000000 4F 4B 41 59 OKAY

dump.bin created.
Closing device.
Press any key to continue . . .

C:\Users\homepc\Desktop\New folder (5)>newflasher Read-TA:2:2205
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newflasher v36 by Munjeni @ 2017/2020
--------------------------------------------------------

Determining available free space by GetDiskFreeSpaceEx:

Available space to caller = 321026 MB
Total space on current drive = 837260 MB
Free space on drive = 321026 MB
Device path: \\?\usb#vid_0fce&pid_b00b#5&521a615&0&1#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Class Description: SOMC Flash Device
Device Instance Id: USB\VID_0FCE&PID_B00B\5&521A615&0&1

Writing command: Read-TA:2:2205
got first reply[0xC]:

00000000 44 41 54 41 30 30 30 30 30 30 30 65 DATA0000000e

data_buf[0xE]:

00000000 31 33 31 37 2D 37 35 30 30 5F 52 31 32 43 1317-7500_R12C

replied[0x4]:

00000000 4F 4B 41 59 OKAY

dump.bin created.
Closing device.
Press any key to continue . . .

C:\Users\homepc\Desktop\New folder (5)>newflasher Read-TA:2:2206
--------------------------------------------------------
newflasher v36 by Munjeni @ 2017/2020
--------------------------------------------------------

Determining available free space by GetDiskFreeSpaceEx:

Available space to caller = 321026 MB
Total space on current drive = 837260 MB
Free space on drive = 321026 MB
Device path: \\?\usb#vid_0fce&pid_b00b#5&521a615&0&1#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Class Description: SOMC Flash Device
Device Instance Id: USB\VID_0FCE&PID_B00B\5&521A615&0&1

Writing command: Read-TA:2:2206
got first reply[0xC]:

00000000 44 41 54 41 30 30 30 30 30 30 31 33 DATA00000013

data_buf[0x13]:

00000000 47 45 4E 45 52 49 43 5F 35 33 2E 31 2E 41 2E 33 GENERIC_53.1.A.3
00000010 2E 33 34 .34

replied[0x4]:

00000000 4F 4B 41 59 OKAY

dump.bin created.
Closing device.
Press any key to continue . . .

C:\Users\homepc\Desktop\New folder (5)>newflasher Read-TA:2:2207
--------------------------------------------------------
newflasher v36 by Munjeni @ 2017/2020
--------------------------------------------------------

Determining available free space by GetDiskFreeSpaceEx:

Available space to caller = 321026 MB
Total space on current drive = 837260 MB
Free space on drive = 321026 MB
Device path: \\?\usb#vid_0fce&pid_b00b#5&521a615&0&1#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Class Description: SOMC Flash Device
Device Instance Id: USB\VID_0FCE&PID_B00B\5&521A615&0&1

Writing command: Read-TA:2:2207
got first reply[0xC]:

00000000 44 41 54 41 30 30 30 30 30 30 32 32 DATA00000022

data_buf[0x22]:

00000000 31 33 31 30 2D 30 33 30 31 5F 58 5F 42 6F 6F 74 1310-0301_X_Boot
00000010 5F 53 44 4D 36 33 30 5F 4C 41 33 2E 30 5F 50 5F _SDM630_LA3.0_P_
00000020 32 38 28

replied[0x4]:

00000000 4F 4B 41 59 OKAY

dump.bin created.
Closing device.
Press any key to continue . . .

C:\Users\homepc\Desktop\New folder (5)>newflasher Read-TA:2:2475
--------------------------------------------------------
newflasher v36 by Munjeni @ 2017/2020
--------------------------------------------------------

Determining available free space by GetDiskFreeSpaceEx:

Available space to caller = 321026 MB
Total space on current drive = 837260 MB
Free space on drive = 321026 MB
Device path: \\?\usb#vid_0fce&pid_b00b#5&521a615&0&1#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Class Description: SOMC Flash Device
Device Instance Id: USB\VID_0FCE&PID_B00B\5&521A615&0&1

Writing command: Read-TA:2:2475
got first reply[0xC]:

00000000 44 41 54 41 30 30 30 30 30 33 64 34 DATA000003d4

data_buf[0x3D4]:

00000000 4E 45 57 5F 56 45 52 53 49 4F 4E 3A 20 65 72 61 NEW_VERSION: era
00000010 73 65 64 5F 75 73 65 72 5F 64 61 74 61 3A 74 72 sed_user_data:tr
00000020 75 65 2C 20 76 61 72 69 61 6E 74 3A 75 73 65 72 ue, variant:user
00000030 2C 20 73 31 62 6F 6F 74 5F 76 65 72 73 69 6F 6E , s1boot_version
00000040 3A 31 33 31 30 2D 30 33 30 31 5F 58 5F 42 6F 6F :1310-0301_X_Boo
00000050 74 5F 53 44 4D 36 33 30 5F 4C 41 33 2E 30 5F 50 t_SDM630_LA3.0_P
00000060 5F 32 38 2C 20 63 64 66 5F 76 65 72 73 69 6F 6E _28, cdf_version
00000070 3A 31 33 31 38 2D 36 37 32 39 5F 52 32 41 2C 20 :1318-6729_R2A,
00000080 66 73 5F 76 65 72 73 69 6F 6E 3A 47 45 4E 45 52 fs_version:GENER
00000090 49 43 5F 35 33 2E 30 2E 41 2E 32 2E 31 33 39 2C IC_53.0.A.2.139,
000000A0 20 73 77 5F 76 65 72 73 69 6F 6E 3A 31 33 31 36 sw_version:1316
000000B0 2D 37 32 32 32 5F 35 33 2E 30 2E 41 2E 32 2E 31 -7222_53.0.A.2.1
000000C0 33 39 0A 4E 45 57 5F 56 45 52 53 49 4F 4E 3A 20 39.NEW_VERSION:
000000D0 65 72 61 73 65 64 5F 75 73 65 72 5F 64 61 74 61 erased_user_data
000000E0 3A 74 72 75 65 2C 20 76 61 72 69 61 6E 74 3A 75 :true, variant:u
000000F0 73 65 72 2C 20 73 31 62 6F 6F 74 5F 76 65 72 73 ser, s1boot_vers
00000100 69 6F 6E 3A 31 33 31 30 2D 30 33 30 31 5F 58 5F ion:1310-0301_X_
00000110 42 6F 6F 74 5F 53 44 4D 36 33 30 5F 4C 41 33 2E Boot_SDM630_LA3.
00000120 30 2E 31 5F 50 5F 34 30 32 2C 20 63 64 66 5F 76 0.1_P_402, cdf_v
00000130 65 72 73 69 6F 6E 3A 31 33 31 37 2D 37 35 30 30 ersion:1317-7500
00000140 5F 52 31 32 43 2C 20 66 73 5F 76 65 72 73 69 6F _R12C, fs_versio
00000150 6E 3A 47 45 4E 45 52 49 43 5F 35 33 2E 31 2E 41 n:GENERIC_53.1.A
00000160 2E 33 2E 33 34 2C 20 73 77 5F 76 65 72 73 69 6F .3.34, sw_versio
00000170 6E 3A 31 33 31 38 2D 36 31 32 30 5F 35 33 2E 31 n:1318-6120_53.1
00000180 2E 41 2E 33 2E 33 34 0A 4E 45 57 5F 56 45 52 53 .A.3.34.NEW_VERS
00000190 49 4F 4E 3A 20 65 72 61 73 65 64 5F 75 73 65 72 ION: erased_user
000001A0 5F 64 61 74 61 3A 74 72 75 65 2C 20 76 61 72 69 _data:true, vari
000001B0 61 6E 74 3A 75 73 65 72 2C 20 73 31 62 6F 6F 74 ant:user, s1boot
000001C0 5F 76 65 72 73 69 6F 6E 3A 31 33 31 30 2D 30 33 _version:1310-03
000001D0 30 31 5F 58 5F 42 6F 6F 74 5F 53 44 4D 36 33 30 01_X_Boot_SDM630
000001E0 5F 4C 41 33 2E 30 5F 50 5F 32 38 2C 20 63 64 66 _LA3.0_P_28, cdf
000001F0 5F 76 65 72 73 69 6F 6E 3A 31 33 31 39 2D 31 32 _version:1319-12
00000200 37 31 5F 52 31 41 2C 20 66 73 5F 76 65 72 73 69 71_R1A, fs_versi
00000210 6F 6E 3A 47 45 4E 45 52 49 43 5F 35 33 2E 30 2E on:GENERIC_53.0.
00000220 41 2E 32 2E 31 33 39 2C 20 73 77 5F 76 65 72 73 A.2.139, sw_vers
00000230 69 6F 6E 3A 31 33 31 36 2D 37 32 32 32 5F 35 33 ion:1316-7222_53
00000240 2E 30 2E 41 2E 32 2E 31 33 39 0A 4E 45 57 5F 56 .0.A.2.139.NEW_V
00000250 45 52 53 49 4F 4E 3A 20 65 72 61 73 65 64 5F 75 ERSION: erased_u
00000260 73 65 72 5F 64 61 74 61 3A 74 72 75 65 2C 20 76 ser_data:true, v
00000270 61 72 69 61 6E 74 3A 75 73 65 72 2C 20 73 31 62 ariant:user, s1b
00000280 6F 6F 74 5F 76 65 72 73 69 6F 6E 3A 31 33 31 30 oot_version:1310
00000290 2D 30 33 30 31 5F 58 5F 42 6F 6F 74 5F 53 44 4D -0301_X_Boot_SDM
000002A0 36 33 30 5F 4C 41 33 2E 30 2E 31 5F 50 5F 34 30 630_LA3.0.1_P_40
000002B0 32 2C 20 63 64 66 5F 76 65 72 73 69 6F 6E 3A 31 2, cdf_version:1
000002C0 33 31 37 2D 37 35 30 30 5F 52 31 32 43 2C 20 66 317-7500_R12C, f
000002D0 73 5F 76 65 72 73 69 6F 6E 3A 47 45 4E 45 52 49 s_version:GENERI
000002E0 43 5F 35 33 2E 31 2E 41 2E 33 2E 33 34 2C 20 73 C_53.1.A.3.34, s
000002F0 77 5F 76 65 72 73 69 6F 6E 3A 31 33 31 38 2D 36 w_version:1318-6
00000300 31 32 30 5F 35 33 2E 31 2E 41 2E 33 2E 33 34 0A 120_53.1.A.3.34.
00000310 4E 45 57 5F 56 45 52 53 49 4F 4E 3A 20 65 72 61 NEW_VERSION: era
00000320 73 65 64 5F 75 73 65 72 5F 64 61 74 61 3A 66 61 sed_user_data:fa
00000330 6C 73 65 2C 20 76 61 72 69 61 6E 74 3A 75 73 65 lse, variant:use
00000340 72 2C 20 73 31 62 6F 6F 74 5F 76 65 72 73 69 6F r, s1boot_versio
00000350 6E 3A 31 33 31 30 2D 30 33 30 31 5F 58 5F 42 6F n:1310-0301_X_Bo
00000360 6F 74 5F 53 44 4D 36 33 30 5F 4C 41 33 2E 30 5F ot_SDM630_LA3.0_
00000370 50 5F 32 38 2C 20 63 64 66 5F 76 65 72 73 69 6F P_28, cdf_versio
00000380 6E 3A 31 33 31 37 2D 37 35 30 30 5F 52 31 32 43 n:1317-7500_R12C
00000390 2C 20 66 73 5F 76 65 72 73 69 6F 6E 3A 47 45 4E , fs_version:GEN
000003A0 45 52 49 43 5F 35 33 2E 31 2E 41 2E 33 2E 33 34 ERIC_53.1.A.3.34
000003B0 2C 20 73 77 5F 76 65 72 73 69 6F 6E 3A 31 33 31 , sw_version:131
000003C0 38 2D 36 31 32 30 5F 35 33 2E 31 2E 41 2E 33 2E 8-6120_53.1.A.3.
000003D0 33 34 0A 00 34..

replied[0x4]:

00000000 4F 4B 41 59 OKAY

dump.bin created.
Closing device.
Press any key to continue . . .

C:\Users\homepc\Desktop\New folder (5)>newflasher Read-TA:2:2498
--------------------------------------------------------
newflasher v36 by Munjeni @ 2017/2020
--------------------------------------------------------

Determining available free space by GetDiskFreeSpaceEx:

Available space to caller = 321026 MB
Total space on current drive = 837260 MB
Free space on drive = 321026 MB
Device path: \\?\usb#vid_0fce&pid_b00b#5&521a615&0&1#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Class Description: SOMC Flash Device
Device Instance Id: USB\VID_0FCE&PID_B00B\5&521A615&0&1

Writing command: Read-TA:2:2498
got first reply[0x2A]:

00000000 46 41 49 4C 55 6E 61 62 6C 65 20 74 6F 20 72 65 FAILUnable to re
00000010 61 64 20 54 41 20 75 6E 69 74 20 32 34 39 38 2C ad TA unit 2498,
00000020 20 65 72 72 6F 72 3D 2D 32 32 error=-22

got fail reply: FAILUnable to read TA unit 2498, error=-22
Closing device.
Press any key to continue . . .

You can see how newflasher performing steps in full details, apsolutly no chance for something to happen without seeing it on main window.