Redmi 9C is a xiaomi device (codename: angelica). FirmwareMirror hosts 126 verified firmware builds. Available as Fastboot & Recovery ROM formats, compatible with Android 12.0. Last updated: August 2023. All files MD5-verified. Free, no registration.
Find and download official MIUI ROM for Redmi 9C (angelica). All firmware files include MD5 hash verification and are available for direct download.
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| V12.0.19.0.QCRINXM | Recovery | 1.7 GB | 2022-09-06 |
355be36c6cb344ec24403b70448a0a7a
|
Download |
| V12.0.18.0.QCRINXM | Recovery | 1.7 GB | 2022-06-13 |
ba077d5265a5c24070e865992d8f61f8
|
Download |
| V12.0.17.0.QCRINXM | Recovery | 1.7 GB | 2022-03-10 |
64b77807cd1f69b9f71a5cbaedb87f36
|
Download |
| V12.0.16.0.QCRINXM | Recovery | 1.7 GB | 2022-01-27 |
971ab660f0ad74aff630d2cf19c67fd0
|
Download |
| V12.0.15.0.QCRINXM | Recovery | 1.7 GB | 2021-11-19 |
47ccced03d35a4a3d4ce51657ce35f8f
|
Download |
| V12.0.13.0.QCRINXM | Recovery | 1.7 GB | 2021-08-30 |
b0ba3b3667308f663ae085604d16eacc
|
Download |
| V12.0.12.0.QCRINXM | Recovery | 1.7 GB | 2021-07-16 |
74d9066b30bdd6d82e04c17c7a67eb41
|
Download |
| V12.0.11.0.QCRINXM | Recovery | 1.7 GB | 2021-05-27 |
60641030ceaceb690b8877d317c4a534
|
Download |
| V12.0.9.0.QCRINXM | Recovery | 1.7 GB | 2021-05-06 |
d1197165a220d48c6bc7975a750245e7
|
Download |
| V12.0.8.0.QCRINXM | Recovery | 1.7 GB | 2021-03-26 |
bd0ef96b8ba84e374a49324bd53760ac
|
Download |
| V12.0.7.0.QCRINXM | Recovery | 1.6 GB | 2021-02-18 |
4923254a43d54c263621a9e880698adc
|
Download |
| V12.0.5.0.QCRINXM | Recovery | 1.6 GB | 2020-12-25 |
58e4e891b683e7693db767b631728e37
|
Download |
| V12.0.3.0.QCRINXM | Recovery | 1.6 GB | 2020-11-03 |
af313c264151adfa134a969e45a79f0b
|
Download |
| V12.0.1.0.QCRINXM | Recovery | 1.6 GB | 2020-10-20 |
785408967421b8e1da742cdbb7f56234
|
Download |
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| V12.5.5.0.RCRINRF | Recovery | 2 GB | 2023-08-07 |
a6450b32f451622c810bd6e05aeefc8a
|
Download |
| V12.5.4.0.RCRINRF | Recovery | 2 GB | 2023-05-15 |
4495ffa6349cb0eb7c44cb4262b66ab3
|
Download |
| V12.5.3.0.RCRINRF | Recovery | 2 GB | 2022-10-20 |
09571cbded9cb03cb3ab7b26084e99af
|
Download |
| V12.5.2.0.RCRINRF | Recovery | 1.9 GB | 2022-08-30 |
66b7fd2a2b47f2e70699f43dc755d907
|
Download |
| V12.0.10.0.QCRINRF | Recovery | 1.8 GB | 2023-03-17 |
9cea8efcf8c4aad10b498a2015f92fce
|
Download |
| V12.0.9.0.QCRINRF | Recovery | 1.8 GB | 2022-12-22 |
b22ec3956f2603a2488877903c13579f
|
Download |
| V12.0.6.0.QCRINRF | Recovery | 1.8 GB | 2022-04-26 |
cdf0d624a9a119a1d678273dd12040aa
|
Download |
| V12.0.4.0.QCRINRF | Recovery | 1.8 GB | 2022-02-17 |
bed3b1379bb79af101a23ca4c5f48bc9
|
Download |
| V12.0.3.0.QCRINRF | Recovery | 1.8 GB | 2021-11-30 |
333d397072a0c60c3035e8cdfbf8fb85
|
Download |
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| V12.5.2.0.RCREUXM | Recovery | 2.1 GB | 2022-07-20 |
40f586f5b92230901e6a768a2f5c4d4f
|
Download |
| V12.0.14.0.QCREUXM | Fastboot | 4.1 GB | 2022-08-16 |
ca6cb27c194b82282d56adadd378f740
|
Download |
| V12.0.13.0.QCREUXM | Recovery | 1.8 GB | 2022-05-25 |
ae49f465bb36fbfca887cee4564cea51
|
Download |
| V12.0.12.0.QCREUXM | Recovery | 1.8 GB | 2022-02-26 |
c5acaf9b5235926002b31d5d74907dc1
|
Download |
| V12.0.11.0.QCREUXM | Recovery | 1.8 GB | 2022-01-21 |
0c5d54a69ceb4e0d8bdbf16b0a7fa72e
|
Download |
| V12.0.10.0.QCREUXM | Recovery | 1.8 GB | 2021-11-11 |
d2c458055e62f64ab9fd82d7490928ec
|
Download |
| V12.0.9.0.QCREUXM | Recovery | 1.8 GB | 2021-08-15 |
50f16d68f959bc3f474e0c0cd02769b1
|
Download |
| V12.0.8.0.QCREUXM | Recovery | 1.8 GB | 2021-06-03 |
3cb926b1fa5ac1a62209a4cc84b286ac
|
Download |
| V12.0.7.0.QCREUXM | Recovery | 1.8 GB | 2021-04-12 |
6bbe157a8406de39b085bb2139df02bb
|
Download |
| V12.0.6.0.QCREUXM | Recovery | 1.7 GB | 2021-01-25 |
ccaaf8cc34c3da6e48d7b2a6e518ccca
|
Download |
| V12.0.5.0.QCREUXM | Recovery | 1.7 GB | 2020-11-09 |
0aa7f6711157d858fcab8fda48b49cfc
|
Download |
| V12.0.4.0.QCREUXM | Recovery | 1.7 GB | 2020-09-21 |
5a491c241cfe7d56a50e34db59e10e34
|
Download |
| V12.0.3.0.QCREUXM | Recovery | 1.7 GB | 2020-09-01 |
f1b540faf3c19aacc990eb70e10d1391
|
Download |
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| V12.5.4.0.RCRMIXM | Recovery | 2 GB | 2022-07-29 |
e206a639c8123dea3d1d9452d4705221
|
Download |
| V12.0.23.0.QCRMIXM | Fastboot | 4.2 GB | 2023-03-23 |
e388f9344e780a2d0e733bbee08d5129
|
Download |
| V12.0.22.0.QCRMIXM | Recovery | 1.8 GB | 2022-06-22 |
4b382a38cf37c7f925a1d5af27dc2c28
|
Download |
| V12.0.21.0.QCRMIXM | Recovery | 1.8 GB | 2022-03-11 |
597ab4f587e74f96a5552a9f4ae5c610
|
Download |
| V12.0.20.0.QCRMIXM | Recovery | 1.8 GB | 2022-02-07 |
825918fc2af4ef03e2a8c768d3677c27
|
Download |
| V12.0.18.0.QCRMIXM | Recovery | 1.8 GB | 2021-11-06 |
55bbc61cf97a8245bb664d9fe6f528e0
|
Download |
| V12.0.16.0.QCRMIXM | Recovery | 1.8 GB | 2021-08-13 |
5b337d63586943b51f0f757c48131e51
|
Download |
| V12.0.15.0.QCRMIXM | Recovery | 1.8 GB | 2021-07-12 |
3876c7ac01d43347eaf0ae144ce57813
|
Download |
| V12.0.14.0.QCRMIXM | Recovery | 1.7 GB | 2021-06-08 |
a1389b74d40bc1ec002748bb35d1c7b5
|
Download |
| V12.0.13.0.QCRMIXM | Recovery | 1.7 GB | 2021-05-21 |
b9c182807bb37f99630c6a1fda3ea528
|
Download |
| V12.0.12.0.QCRMIXM | Recovery | 1.7 GB | 2021-04-16 |
1fb4c1f4de24807b4eaf7e557268ee9f
|
Download |
| V12.0.10.0.QCRMIXM | Recovery | 1.7 GB | 2021-01-26 |
3b66ab0d9b36d1026d723ca0fd342a06
|
Download |
| V12.0.8.0.QCRMIXM | Recovery | 1.7 GB | 2021-01-05 |
5fca33156e2226569d407d7481b1321b
|
Download |
| V12.0.7.0.QCRMIXM | Recovery | 1.6 GB | 2020-10-28 |
4623e90b155c535d5beb1017cc9ce684
|
Download |
| V12.0.6.0.QCRMIXM | Recovery | 1.6 GB | 2020-11-09 |
73b44707e6791b18d8c1760afe552cf1
|
Download |
| V12.0.5.0.QCRMIXM | Recovery | 1.6 GB | 2020-09-21 |
8ae1eb301018b20142bab8cc8645345d
|
Download |
| V12.0.4.0.QCRMIXM | Recovery | 1.6 GB | 2020-09-01 |
35353d03493a2ea878aab31121abfa84
|
Download |
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| V12.5.3.0.RCRIDXM | Recovery | 2 GB | 2022-08-30 |
f393b1e84d96c354a555b06e43ef2904
|
Download |
| V12.0.14.0.QCRIDXM | Fastboot | 3.5 GB | 2022-08-19 |
f3c00f4897a098124e6513196feb45f2
|
Download |
| V12.0.13.0.QCRIDXM | Recovery | 1.8 GB | 2022-06-21 |
ff2e33fbead7bc0cc2d08822244865b1
|
Download |
| V12.0.12.0.QCRIDXM | Recovery | 1.8 GB | 2022-03-08 |
8c26b4d7aae1d1d06aeb702f8df9bb36
|
Download |
| V12.0.11.0.QCRIDXM | Recovery | 1.8 GB | 2022-01-25 |
5e0dcc21983b4f001d76e36336ecae80
|
Download |
| V12.0.10.0.QCRIDXM | Recovery | 1.8 GB | 2021-11-21 |
52ffef3514338bc75fe403519e3396e3
|
Download |
| V12.0.9.0.QCRIDXM | Recovery | 1.8 GB | 2021-08-18 |
d8baa0a48765c0c0af9051a23b29e162
|
Download |
| V12.0.8.0.QCRIDXM | Recovery | 1.8 GB | 2021-06-04 |
e048e10766a838f23d8e4469a3f6a685
|
Download |
| V12.0.7.0.QCRIDXM | Recovery | 1.8 GB | 2021-04-16 |
ad4fd667fc360d71555e8b487a9a3d5f
|
Download |
| V12.0.6.0.QCRIDXM | Recovery | 1.7 GB | 2021-02-05 |
fc07aa3f580ba5d6eff70e45367bf33c
|
Download |
| V12.0.5.0.QCRIDXM | Recovery | 1.7 GB | 2021-01-05 |
4aa31d10cef133fe1e3f01a8b69e9582
|
Download |
| V12.0.3.0.QCRIDXM | Recovery | 1.7 GB | 2020-10-28 |
f2e88ec547c7f1f2a8f219b6439574fc
|
Download |
| V12.0.2.0.QCRIDXM | Recovery | 1.7 GB | 2020-09-21 |
0806c14d4accc2e1caa9827e96a99760
|
Download |
| V12.0.1.0.QCRIDXM | Recovery | 1.7 GB | 2020-09-18 |
8779a9afd125e08c75e8381c6e6df7c0
|
Download |
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| V12.5.4.0.RCSEUXM | Recovery | 2.1 GB | 2022-08-10 |
e8d0048895491dd8feb8c86659fb264a
|
Download |
| V12.5.3.0.RCSEUXM | Recovery | 2 GB | 2022-07-04 |
04ab90337defb04b33ccc4ea0d5eaa07
|
Download |
| V12.0.14.0.QCSEUXM | Recovery | 1.8 GB | 2022-08-25 |
b8dd81fed538212d5bd372ea867f0820
|
Download |
| V12.0.13.0.QCSEUXM | Recovery | 1.8 GB | 2022-06-24 |
ac93f9f5cfc4155178d1f3ac1b6d0ac4
|
Download |
| V12.0.12.0.QCSEUXM | Recovery | 1.8 GB | 2022-03-23 |
f362ef2ccea9600a579142dffc597bdf
|
Download |
| V12.0.11.0.QCSEUXM | Recovery | 1.8 GB | 2022-01-27 |
bed722f66e231c5e08973f524b143818
|
Download |
| V12.0.10.0.QCSEUXM | Recovery | 1.8 GB | 2021-11-23 |
aa5fdc59053e7bf62fbb869119a94cc4
|
Download |
| V12.0.9.0.QCSEUXM | Recovery | 1.8 GB | 2021-08-30 |
9a6c4161b5bcb53dd60b09891f94c7aa
|
Download |
| V12.0.8.0.QCSEUXM | Recovery | 1.8 GB | 2021-06-15 |
8b7cb202debe3aa3375495414a3a992e
|
Download |
| V12.0.7.0.QCSEUXM | Recovery | 1.8 GB | 2021-04-13 |
c2bb8e96d4b8bf4d332f085fd5226b3c
|
Download |
| V12.0.6.0.QCSEUXM | Recovery | 1.7 GB | 2021-01-29 |
99197b728bc2ab4fbfcde6158baf3f72
|
Download |
| V12.0.5.0.QCSEUXM | Recovery | 1.7 GB | 2021-01-05 |
fd513a5eba6dd1b1441f285832f65a32
|
Download |
| V12.0.4.0.QCSEUXM | Recovery | 1.7 GB | 2020-11-04 |
e61c5bb519df4275a07b3c9fb50ca709
|
Download |
| V12.0.3.0.QCSEUXM | Recovery | 1.6 GB | 2020-09-07 |
371a4fc443e5200c36936b2c2e67c682
|
Download |
| V12.0.1.0.QCSEUXM | Recovery | 1.7 GB | 2020-09-07 |
8385ce903e29ebf549357a55fb72acfe
|
Download |
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| V12.5.3.0.RCSMIXM | Recovery | 2 GB | 2022-07-21 |
947766e7356d1f8cdfdd016a3b9da3f8
|
Download |
| V12.0.16.0.QCSMIXM | Recovery | 1.8 GB | 2022-10-10 |
aa62ece3215d75f6cc1bfca6cc3bbc63
|
Download |
| V12.0.14.0.QCSMIXM | Recovery | 1.8 GB | 2022-09-09 |
789234f45d4cbec3888067a97d9fe3ce
|
Download |
| V12.0.13.0.QCSMIXM | Recovery | 1.8 GB | 2022-06-22 |
f1585a09bf733d40be336fae4a24334f
|
Download |
| V12.0.12.0.QCSMIXM | Recovery | 1.8 GB | 2022-03-15 |
fe40256a312f4b3a80c6450f56ab971d
|
Download |
| V12.0.11.0.QCSMIXM | Recovery | 1.8 GB | 2022-01-24 |
8ed7134654aff2bd6914a9914b727a21
|
Download |
| V12.0.10.0.QCSMIXM | Recovery | 1.8 GB | 2021-11-23 |
ba9a16c42929afe32293be89c50112ce
|
Download |
| V12.0.9.0.QCSMIXM | Recovery | 1.8 GB | 2021-08-22 |
77579e3311e74247e0a0efba7de2eb1b
|
Download |
| V12.0.8.0.QCSMIXM | Recovery | 1.7 GB | 2021-06-15 |
827d83f9eee458b0adcf5e1f54f8e966
|
Download |
| V12.0.7.0.QCSMIXM | Recovery | 1.7 GB | 2021-04-15 |
26e698745af85c625fceb3a8e4bc7857
|
Download |
| V12.0.6.0.QCSMIXM | Recovery | 1.7 GB | 2021-02-03 |
ac2dd2d85bf3023a80c1a3e12910a4e9
|
Download |
| V12.0.5.0.QCSMIXM | Recovery | 1.6 GB | 2021-01-04 |
fead7547952f626d0274f0822f5c3c71
|
Download |
| V12.0.3.0.QCSMIXM | Recovery | 1.6 GB | 2020-11-05 |
a35644ae9ee85572151cc4fc71d9433d
|
Download |
| V12.0.2.0.QCSMIXM | Recovery | 1.6 GB | 2020-09-24 |
de995da9291f1d75b9375ad68aa2434b
|
Download |
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| V12.5.3.0.RCSRUXM | Recovery | 2 GB | 2022-08-30 |
57e0de1031409884409c30a630a9b18c
|
Download |
| V12.0.14.0.QCSRUXM | Recovery | 1.8 GB | 2022-06-22 |
1a7bd185696c8af2c8970d30ff79e270
|
Download |
| V12.0.13.0.QCSRUXM | Recovery | 1.8 GB | 2022-03-22 |
d03b1a7549e5134f41937c22b1aab3e6
|
Download |
| V12.0.12.0.QCSRUXM | Recovery | 1.8 GB | 2022-01-28 |
c9e23e3cf72ca5b3460a66dac2a3d4c9
|
Download |
| V12.0.11.0.QCSRUXM | Recovery | 1.8 GB | 2021-11-22 |
c5e5b236378c8fefba6a655f9fc474cf
|
Download |
| V12.0.10.0.QCSRUXM | Recovery | 1.8 GB | 2021-08-21 |
8316e2b257842983796ae38822d72f53
|
Download |
| V12.0.9.0.QCSRUXM | Recovery | 1.8 GB | 2021-06-17 |
473b67faae49ded1a19ebd07a18dd000
|
Download |
| V12.0.8.0.QCSRUXM | Recovery | 1.8 GB | 2021-05-27 |
098f563889ffa24d5ad210a44137d2fe
|
Download |
| V12.0.7.0.QCSRUXM | Recovery | 1.7 GB | 2021-03-21 |
ab513931d12f358a40cbfa712b47ea1d
|
Download |
| V12.0.6.0.QCSRUXM | Recovery | 1.7 GB | 2021-02-07 |
01ff67755364c0deca6801f684bf254d
|
Download |
| V12.0.5.0.QCSRUXM | Recovery | 1.7 GB | 2021-01-07 |
e656ac48ab270265569404a55d3572e1
|
Download |
| V12.0.4.0.QCSRUXM | Recovery | 1.7 GB | 2020-10-30 |
e5c1f5df255c20e4826943a02be94298
|
Download |
| V12.0.3.0.QCSRUXM | Recovery | 1.7 GB | 2020-09-01 |
31941f0c91537b6928d4eb3413a1df73
|
Download |
| Version | Method | Size | Release Date | MD5 Hash | Download |
|---|---|---|---|---|---|
| V12.5.3.0.RCSRUXM | Recovery | 2 GB | 2022-08-30 |
57e0de1031409884409c30a630a9b18c
|
Download |
| V12.0.14.0.QCSRUXM | Recovery | 1.8 GB | 2022-06-22 |
1a7bd185696c8af2c8970d30ff79e270
|
Download |
| V12.0.13.0.QCSRUXM | Recovery | 1.8 GB | 2022-03-22 |
d03b1a7549e5134f41937c22b1aab3e6
|
Download |
| V12.0.12.0.QCSRUXM | Recovery | 1.8 GB | 2022-01-28 |
c9e23e3cf72ca5b3460a66dac2a3d4c9
|
Download |
| V12.0.11.0.QCSRUXM | Recovery | 1.8 GB | 2021-11-22 |
c5e5b236378c8fefba6a655f9fc474cf
|
Download |
| V12.0.10.0.QCSRUXM | Recovery | 1.8 GB | 2021-08-21 |
8316e2b257842983796ae38822d72f53
|
Download |
| V12.0.9.0.QCSRUXM | Recovery | 1.8 GB | 2021-06-17 |
473b67faae49ded1a19ebd07a18dd000
|
Download |
| V12.0.8.0.QCSRUXM | Recovery | 1.8 GB | 2021-05-27 |
098f563889ffa24d5ad210a44137d2fe
|
Download |
| V12.0.7.0.QCSRUXM | Recovery | 1.7 GB | 2021-03-21 |
ab513931d12f358a40cbfa712b47ea1d
|
Download |
| V12.0.6.0.QCSRUXM | Recovery | 1.7 GB | 2021-02-07 |
01ff67755364c0deca6801f684bf254d
|
Download |
| V12.0.5.0.QCSRUXM | Recovery | 1.7 GB | 2021-01-07 |
e656ac48ab270265569404a55d3572e1
|
Download |
| V12.0.4.0.QCSRUXM | Recovery | 1.7 GB | 2020-10-30 |
e5c1f5df255c20e4826943a02be94298
|
Download |
| V12.0.3.0.QCSRUXM | Recovery | 1.7 GB | 2020-09-01 |
31941f0c91537b6928d4eb3413a1df73
|
Download |
| Network | Technology | GSM / HSPA / LTE |
|---|---|---|
| 2G bands | GSM 850 / 900 / 1800 / 1900 | |
| 3G bands | HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 | |
| 4G bands | 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 40, 41 | |
| Speed | HSPA, LTE |
| Launch | Announced | 2020, June 30. Released 2020, August 12 |
|---|---|---|
| Status | Discontinued |
| Body | Dimensions | 164.9 x 77 x 9 mm (6.49 x 3.03 x 0.35 in) |
|---|---|---|
| Weight | 196 g (6.91 oz) | |
| SIM | Nano-SIM + Nano-SIM |
| Display | Type | IPS LCD, 400 nits (typ) |
|---|---|---|
| Size | 6.53 inches, 102.9 cm2 (~81.1% screen-to-body ratio) | |
| Resolution | 720 x 1600 pixels, 20:9 ratio (~269 ppi density) |
| Platform | OS | Android 10, MIUI 12 |
|---|---|---|
| Chipset | Mediatek MT6765G Helio G35 (12 nm) | |
| CPU | Octa-core (4x2.3 GHz Cortex-A53 & 4x1.8 GHz Cortex-A53) | |
| GPU | PowerVR GE8320 |
| Memory | Card slot | microSDXC (dedicated slot) |
|---|---|---|
| Internal | 32GB 2GB RAM, 32GB 3GB RAM, 64GB 2GB RAM, 64GB 3GB RAM, 64GB 4GB RAM, 128GB 4GB RAM | |
| eMMC 5.1 |
| Main Camera | Triple | 13 MP, f/2.2, 28mm (wide), 1.0µm, PDAF 2 MP (macro) Auxiliary lens |
|---|---|---|
| Features | LED flash, HDR | |
| Video | 1080p@30fps |
| Selfie camera | Single | 5 MP, f/2.2, (wide), 1.12µm |
|---|---|---|
| Features | HDR | |
| Video | 1080p@30fps |
| Sound | Loudspeaker | Yes |
|---|---|---|
| 3.5mm jack | Yes |
| Comms | WLAN | Wi-Fi 802.11 b/g/n, Wi-Fi Direct |
|---|---|---|
| Bluetooth | 5.0, A2DP, LE | |
| Positioning | GPS, GLONASS, BDS | |
| NFC | No | |
| Radio | FM radio | |
| USB | microUSB 2.0, OTG |
| Features | Sensors | Fingerprint (rear-mounted), accelerometer, proximity |
|---|
| Battery | Type | Li-Po 5000 mAh |
|---|---|---|
| Charging | 10W wired |
| Misc | Colors | Midnight Gray, Sunrise Orange, Twilight Blue |
|---|---|---|
| Models | M2006C3MG, M2006C3MT | |
| SAR | 0.73 W/kg (head) 0.52 W/kg (body) | |
| SAR EU | 0.35 W/kg (head) 0.78 W/kg (body) | |
| Price | About 80 EUR |
A: Yes — official firmware from the manufacturer is generally safe when you match your device's exact model number and region. Flashing the wrong region or modified firmware can cause issues.
A: Redmi 9C firmware is flashed using MiFlash. See the step-by-step guide above for the full procedure.
A: Some devices allow downgrading, others have anti-rollback protection that blocks it. Check the version-specific notes on each ROM page, or your model's community forum, before attempting a downgrade.
A: First, verify the firmware matches your exact model code (e.g. SM-S938B for Samsung, or the CPH-number for OPPO). Reinstall the manufacturer's USB drivers, use a rear USB 2.0 port directly on your PC, and retry. The troubleshooting box above the FAQ covers the most common failure modes.
