[Nothing Phone 2] xtcislove:
There is something wrong with 2.5.2 for me. I usually do a fastboot update with your files but this time is does not work.

2.5.2:

F:\Android\NothingPhone2\platform-tools_r33.0.3-windows>fastboot update F:\Android\NothingPhone2\Pong_U2.5-240116-1446_2.5.2\Pong_U2.5-240116-1446_2.5.2\Pong_U2.5-240116-1446_2.5.2.zip
--------------------------------------------
Bootloader Version...: 00979.4-WAIPIO-1
Baseband Version.....: 01026.2-WAIPIO_GEN_PACK-1
Serial Number........: 2a0a2c3f
--------------------------------------------
extracting android-info.txt (0 MB) to RAM...
Checking 'product' OKAY [ 0.003s]
Setting current slot to 'b' OKAY [ 0.001s]
extracting boot.img (96 MB) to disk... took 0.037s
archive does not contain 'boot.sig'
Sending 'boot_b' (98304 KB) OKAY [ 2.248s]
Writing 'boot_b' OKAY [ 0.211s]
archive does not contain 'init_boot.img'
extracting dtbo.img (23 MB) to disk... took 0.009s
archive does not contain 'dtbo.sig'
Sending 'dtbo' (23552 KB) OKAY [ 0.535s]
Writing 'dtbo' OKAY [ 0.051s]
archive does not contain 'dt.img'
archive does not contain 'pvmfw.img'
extracting recovery.img (100 MB) to disk... took 0.038s
archive does not contain 'recovery.sig'
Sending 'recovery' (102400 KB) OKAY [ 2.330s]
Writing 'recovery' OKAY [ 0.196s]
extracting vbmeta.img (0 MB) to disk... took 0.000s
archive does not contain 'vbmeta.sig'
Sending 'vbmeta' (8 KB) OKAY [ 0.002s]
Writing 'vbmeta' OKAY [ 0.001s]
extracting vbmeta_system.img (0 MB) to disk... took 0.000s
archive does not contain 'vbmeta_system.sig'
Sending 'vbmeta_system' (4 KB) OKAY [ 0.002s]
Writing 'vbmeta_system' OKAY [ 0.001s]
extracting vbmeta_vendor.img (0 MB) to disk... took 0.000s
archive does not contain 'vbmeta_vendor.sig'
Sending 'vbmeta_vendor' (4 KB) OKAY [ 0.002s]
Writing 'vbmeta_vendor' OKAY [ 0.002s]
extracting vendor_boot.img (96 MB) to disk... took 0.039s
archive does not contain 'vendor_boot.sig'
Sending 'vendor_boot' (98304 KB) OKAY [ 2.233s]
Writing 'vendor_boot' OKAY [ 0.176s]
archive does not contain 'vendor_kernel_boot.img'
archive does not contain 'super_empty.img'
archive does not contain 'boot_other.img'
extracting odm.img (1 MB) to disk... took 0.000s
archive does not contain 'odm.sig'
Sending 'odm' (1432 KB) OKAY [ 0.034s]
Writing 'odm' FAILED (remote: '(odm_b) No such partition')
fastboot: error: Command failed

2.5.1a (success):

F:\Android\NothingPhone2\platform-tools_r33.0.3-windows>fastboot update F:\Android\NothingPhone2\Pong_U2.5-231228-1342_2.5.1a\Pong_U2.5-231228-1342.zip
--------------------------------------------
Bootloader Version...: 00979.4-WAIPIO-1
Baseband Version.....: 01026.2-WAIPIO_GEN_PACK-1
Serial Number........: 2a0a2c3f
--------------------------------------------
extracting android-info.txt (0 MB) to RAM...
Checking 'product' OKAY [ 0.003s]
Setting current slot to 'b' OKAY [ 0.002s]
extracting boot.img (96 MB) to disk... took 0.617s
archive does not contain 'boot.sig'
Sending 'boot_b' (98304 KB) OKAY [ 2.247s]
Writing 'boot_b' OKAY [ 0.192s]
archive does not contain 'init_boot.img'
extracting dtbo.img (23 MB) to disk... took 0.180s
archive does not contain 'dtbo.sig'
Sending 'dtbo' (23552 KB) OKAY [ 0.535s]
Writing 'dtbo' OKAY [ 0.044s]
archive does not contain 'dt.img'
archive does not contain 'pvmfw.img'
extracting recovery.img (100 MB) to disk... took 0.587s
archive does not contain 'recovery.sig'
Sending 'recovery' (102400 KB) OKAY [ 2.329s]
Writing 'recovery' OKAY [ 0.171s]
extracting vbmeta.img (0 MB) to disk... took 0.001s
archive does not contain 'vbmeta.sig'
Sending 'vbmeta' (8 KB) OKAY [ 0.002s]
Writing 'vbmeta' OKAY [ 0.002s]
extracting vbmeta_system.img (0 MB) to disk... took 0.000s
archive does not contain 'vbmeta_system.sig'
Sending 'vbmeta_system' (4 KB) OKAY [ 0.002s]
Writing 'vbmeta_system' OKAY [ 0.001s]
extracting vbmeta_vendor.img (0 MB) to disk... took 0.000s
archive does not contain 'vbmeta_vendor.sig'
Sending 'vbmeta_vendor' (4 KB) OKAY [ 0.001s]
Writing 'vbmeta_vendor' OKAY [ 0.001s]
extracting vendor_boot.img (96 MB) to disk... took 0.808s
archive does not contain 'vendor_boot.sig'
Sending 'vendor_boot' (98304 KB) OKAY [ 2.233s]
Writing 'vendor_boot' OKAY [ 0.182s]
archive does not contain 'vendor_kernel_boot.img'
extracting super_empty.img (0 MB) to disk... took 0.000s
Rebooting into fastboot OKAY [ 0.002s]
< waiting for any device >
Sending 'super' (5 KB) OKAY [ 0.001s]
Updating super partition OKAY [ 0.005s]
Resizing 'odm_b' OKAY [ 0.002s]
Resizing 'product_b' OKAY [ 0.002s]
Resizing 'system_b' OKAY [ 0.002s]
Resizing 'system_ext_b' OKAY [ 0.003s]
Resizing 'system_a' OKAY [ 0.003s]
Resizing 'vendor_b' OKAY [ 0.002s]
Resizing 'vendor_dlkm_b' OKAY [ 0.002s]
Resizing 'vendor_a' OKAY [ 0.002s]
archive does not contain 'boot_other.img'
extracting odm.img (1 MB) to disk... took 0.007s
archive does not contain 'odm.sig'
Resizing 'odm_b' OKAY [ 0.003s]
Sending 'odm_b' (1432 KB) OKAY [ 0.033s]
Writing 'odm_b' OKAY [ 0.020s]
archive does not contain 'odm_dlkm.img'
extracting product.img (2326 MB) to disk... took 17.770s
archive does not contain 'product.sig'
Resizing 'product_b' OKAY [ 0.003s]
Sending sparse 'product_b' 1/10 (262112 KB) OKAY [ 6.103s]
Writing 'product_b' OKAY [ 0.376s]
Sending sparse 'product_b' 2/10 (262124 KB) OKAY [ 6.097s]
Writing 'product_b' OKAY [ 0.414s]
Sending sparse 'product_b' 3/10 (262128 KB) OKAY [ 6.103s]
Writing 'product_b' OKAY [ 0.383s]
Sending sparse 'product_b' 4/10 (262124 KB) OKAY [ 6.103s]
Writing 'product_b' OKAY [ 0.363s]
Sending sparse 'product_b' 5/10 (262124 KB) OKAY [ 6.129s]
Writing 'product_b' OKAY [ 0.389s]
Sending sparse 'product_b' 6/10 (262116 KB) OKAY [ 6.103s]
Writing 'product_b' OKAY [ 0.393s]
Sending sparse 'product_b' 7/10 (262132 KB) OKAY [ 6.098s]
Writing 'product_b' OKAY [ 0.409s]
Sending sparse 'product_b' 8/10 (262104 KB) OKAY [ 6.089s]
Writing 'product_b' OKAY [ 0.398s]
Sending sparse 'product_b' 9/10 (240604 KB) OKAY [ 5.598s]
Writing 'product_b' OKAY [ 0.372s]
Sending sparse 'product_b' 10/10 (37164 KB) OKAY [ 0.866s]
Writing 'product_b' OKAY [ 0.121s]
extracting system.img (1142 MB) to disk... took 7.032s
archive does not contain 'system.sig'
Resizing 'system_b' OKAY [ 0.002s]
Sending sparse 'system_b' 1/5 (262112 KB) OKAY [ 6.119s]
Writing 'system_b' OKAY [ 0.418s]
Sending sparse 'system_b' 2/5 (262112 KB) OKAY [ 6.121s]
Writing 'system_b' OKAY [ 0.393s]
Sending sparse 'system_b' 3/5 (262112 KB) OKAY [ 6.109s]
Writing 'system_b' OKAY [ 0.382s]
Sending sparse 'system_b' 4/5 (262140 KB) OKAY [ 6.113s]
Writing 'system_b' OKAY [ 0.383s]
Sending sparse 'system_b' 5/5 (117656 KB) OKAY [ 2.742s]
Writing 'system_b' OKAY [ 0.252s]
archive does not contain 'system_dlkm.img'
extracting system_ext.img (710 MB) to disk... took 4.723s
archive does not contain 'system_ext.sig'
Resizing 'system_ext_b' OKAY [ 0.003s]
Sending sparse 'system_ext_b' 1/3 (262108 KB) OKAY [ 6.102s]
Writing 'system_ext_b' OKAY [ 0.388s]
Sending sparse 'system_ext_b' 2/3 (262124 KB) OKAY [ 6.098s]
Writing 'system_ext_b' OKAY [ 0.381s]
Sending sparse 'system_ext_b' 3/3 (201216 KB) OKAY [ 4.677s]
Writing 'system_ext_b' OKAY [ 0.303s]
archive does not contain 'system_other.img'
extracting vendor.img (2340 MB) to disk... took 16.724s
archive does not contain 'vendor.sig'
Resizing 'vendor_b' OKAY [ 0.002s]
Sending sparse 'vendor_b' 1/10 (262116 KB) OKAY [ 6.099s]
Writing 'vendor_b' OKAY [ 0.361s]
Sending sparse 'vendor_b' 2/10 (262108 KB) OKAY [ 6.096s]
Writing 'vendor_b' OKAY [ 0.358s]
Sending sparse 'vendor_b' 3/10 (262100 KB) OKAY [ 6.098s]
Writing 'vendor_b' OKAY [ 0.389s]
Sending sparse 'vendor_b' 4/10 (262128 KB) OKAY [ 6.081s]
Writing 'vendor_b' OKAY [ 0.394s]
Sending sparse 'vendor_b' 5/10 (262120 KB) OKAY [ 6.079s]
Writing 'vendor_b' OKAY [ 0.368s]
Sending sparse 'vendor_b' 6/10 (262128 KB) OKAY [ 6.062s]
Writing 'vendor_b' OKAY [ 0.396s]
Sending sparse 'vendor_b' 7/10 (262128 KB) OKAY [ 6.073s]
Writing 'vendor_b' OKAY [ 0.394s]
Sending sparse 'vendor_b' 8/10 (262116 KB) OKAY [ 6.117s]
Writing 'vendor_b' OKAY [ 0.354s]
Sending sparse 'vendor_b' 9/10 (254588 KB) OKAY [ 5.920s]
Writing 'vendor_b' OKAY [ 0.403s]
Sending sparse 'vendor_b' 10/10 (37388 KB) OKAY [ 0.870s]
Writing 'vendor_b' OKAY [ 0.068s]
extracting vendor_dlkm.img (70 MB) to disk... took 1.040s
archive does not contain 'vendor_dlkm.sig'
Resizing 'vendor_dlkm_b' OKAY [ 0.003s]
Sending 'vendor_dlkm_b' (72492 KB) OKAY [ 1.677s]
Writing 'vendor_dlkm_b' OKAY [ 0.191s]
archive does not contain 'vendor_other.img'
Rebooting OKAY [ 0.001s]
Finished. Total time: 247.169s