Samsung Galaxy S21 FE (Asia/Africa) official device image

Samsung Galaxy S21 FE (Asia/Africa)

Brand samsung
Codename sm-g990e
Region AFG,ARO,CTI,UFN,PSN,XSA,OPS,TEL,VAU,BKD,BVO,ZTO,ZT
Official Firmware

Download Samsung Galaxy S21 FE (Asia/Africa) Firmware

Samsung Galaxy S21 FE (Asia/Africa) Region: AFG,ARO,CTI,UFN,PSN,XSA,OPS,TEL,VAU,BKD,BVO,ZTO,ZT

Samsung Galaxy S21 FE (Asia/Africa) is a samsung device (codename: sm-g990e). FirmwareMirror hosts 123 verified firmware builds, covering: ACR, ARO, ZTO, ALE, BKD. Available as official firmware. Last updated: February 2026. All files MD5-verified. Free, no registration.

ACR ARO ZTO ALE BKD XSA CHE AFG

Firmware Downloads

Find and download official Stock ROM for Samsung Galaxy S21 FE (Asia/Africa) (sm-g990e). All firmware files include MD5 hash verification and are available for direct download.

Samsung Galaxy S21 FE (Asia/Africa)

Version Method Size Release Date MD5 Hash Download
G990EXXS9FXE8/G990EOWO9FXE8/G990EXXS9FXE4 Odin 887.59 MB 2024-05-01 N/A Download
G990EXXS9FXE5/G990EOWE9FXE5/G990EXXS9FXE4 Odin 873.14 MB 2024-05-01 N/A Download
G990EXXS9FXE5/G990EOWO9FXE5/G990EXXS9FXE4 Odin 888.73 MB 2024-05-01 N/A Download
G990EXXS9FXE2/G990EOJM9FXE2/G990EXXS9FXE2 Odin 896.19 MB 2024-05-01 N/A Download
G990EXXS9FXF1/G990EOJM9FXE2/G990EXXS9FXE2 Odin 893.08 MB 2024-06-01 N/A Download
G990EXXSDFYC8/G990EOWODFYC8/G990EXXSDFYC7 Odin 3.18 GB 2025-03-01 N/A Download
G990EXXU8FXD4/G990EOWE8FXD5/G990EXXU8FXD4 Odin 842.21 MB 2024-04-01 N/A Download
G990EXXU8FXD4/G990EOWO8FXD5/G990EXXU8FXD4 Odin 276.56 MB 2024-04-01 N/A Download
G990EXXU8FXD3/G990EOJM8FXD3/G990EXXU8FXD3 Odin 895.05 MB 2024-04-01 N/A Download
G990EXXS8FXD1/G990EOJM8FXD1/G990EXXS8FXD1 Odin 2.25 GB 2024-04-01 N/A Download
G990EXXSCFYB7/G990EOWECFYB7/G990EXXSCFYA5 Odin 806.35 MB 2025-02-01 N/A Download
G990EXXSCFYB7/G990EOWOCFYB7/G990EXXSCFYA5 Odin 260.83 MB 2025-02-01 N/A Download
G990EXXU7EWI8/G990EOWE7EWI8/G990EXXU7EWI7 Odin 2.17 GB 2023-09-01 N/A Download
G990EXXU7EWI8/G990EOWO7EWI8/G990EXXU7EWI7 Odin 238.39 MB 2023-09-01 N/A Download
G990EXXU7EWH7/G990EOJM7EWH7/G990EXXU7EWH5 Odin 238.46 MB 2023-08-01 N/A Download
G990EXXS7EWJ7/G990EODM7EWH5/G990EXXU7EWH5 Odin 228.38 MB 2023-10-01 N/A Download
G990EXXS7EWH7/G990EOWO7EWH2/G990EXXS7EWH7 Odin 1.21 GB 2023-08-01 N/A Download
G990EXXS7FXA6/G990EOJM7FWK6/G990EXXU7FWK5 Odin 2.25 GB 2024-01-01 N/A Download
G990EXXS7FWL6/G990EOJM7FWK6/G990EXXU7FWK5 Odin 2.26 GB 2023-12-01 N/A Download
G990EXXU7FWK6/G990EOJM7FWK6/G990EXXU7FWK5 Odin 2.26 GB 2023-11-01 N/A Download
G990EXXS7EWJ5/G990EOJM7EWH7/G990EXXU7EWH5 Odin 229.61 MB 2023-10-01 N/A Download
G990EXXS7FXC5/G990EOWE7FWK6/G990EXXS7FXB5 Odin 2.23 GB 2024-03-01 N/A Download
G990EXXS7FXB5/G990EOWE7FWK6/G990EXXS7FXB5 Odin 2.23 GB 2024-02-01 N/A Download
G990EXXS7FXA5/G990EOWE7FWK6/G990EXXU7FWK5 Odin 1.95 GB 2024-01-01 N/A Download
G990EXXS7FWL5/G990EOWE7FWK6/G990EXXU7FWK5 Odin 1.96 GB 2023-12-01 N/A Download
G990EXXS7FXC5/G990EOWO7FXC5/G990EXXS7FXB5 Odin 2.08 GB 2024-03-01 N/A Download
G990EXXS7FXB5/G990EOWO7FXB5/G990EXXS7FXB5 Odin 2.08 GB 2024-02-01 N/A Download
G990EXXS7FXA5/G990EOWO7FXA5/G990EXXU7FWK5 Odin 2.05 GB 2024-01-01 N/A Download
G990EXXS7EWI5/G990EODM7EWH5/G990EXXU7EWH5 Odin 234.45 MB 2023-09-01 N/A Download
G990EXXS7EWK5/G990EODM7EWH5/G990EXXS7EWK2 Odin 2.18 GB 2023-11-01 N/A Download
G990EXXS7FWL5/G990EOWO7FWL3/G990EXXU7FWK5 Odin 2.05 GB 2023-12-01 N/A Download
G990EXXS7EWH5/G990EOJM7EWG1/G990EXXS7EWH2 Odin 1.11 GB 2023-08-01 N/A Download
G990EXXS7EWI3/G990EOJM7EWH7/G990EXXU7EWH5 Odin 234.52 MB 2023-09-01 N/A Download
G990EXXS7EWK2/G990EOJM7EWH7/G990EXXS7EWK2 Odin 2.17 GB 2023-11-01 N/A Download
G990EXXS7FXC2/G990EOJM7FWK6/G990EXXS7FXC2 Odin 2.25 GB 2024-03-01 N/A Download
G990EXXU7EWI2/G990EODM7EWH5/G990EXXU7EWH5 Odin 239.25 MB 2023-09-01 N/A Download
G990EXXS7EWH2/G990EOWO7EWH2/G990EXXS7EWH2 Odin 1.22 GB 2023-08-01 N/A Download
G990EXXS7EWK1/G990EOWO7EWK2/G990EXXU7EWI7 Odin 2.21 GB 2023-11-01 N/A Download
G990EXXU7FXB1/G990EOWO7FXB1/G990EXXU7FWK5 Odin 2.36 GB 2024-02-01 N/A Download
G990EXXS7EWG1/G990EOJM7EWG1/G990EXXS7EWG1 Odin 1.11 GB 2023-07-01 N/A Download
G990EXXUAFXG6/G990EOJMAFXG6/G990EXXUAFXG5 Odin 359.94 MB 2024-07-01 N/A Download
G990EXXS6EWF4/G990EOWO6EWF2/G990EXXU6EWF2 Odin 1.22 GB 2023-06-01 N/A Download
G990EXXS6EWE3/G990EOJM6EWE3/G990EXXS6EWE3 Odin 1.23 GB 2023-05-01 N/A Download
G990EXXU6EWF2/G990EOJM6EWF2/G990EXXU6EWF2 Odin 1.12 GB 2023-06-01 N/A Download
G990EXXSDFYC5/G990EOJMDFYC5/G990EXXSDFYC5 Odin 3.11 GB 2025-03-01 N/A Download
G990EXXSCFYA5/G990EOWOCFYA5/G990EXXSCFYA5 Odin 264.99 MB 2025-01-01 N/A Download
G990EXXSCFXJ5/G990EOWECFXJ5/G990EXXSCFXJ5 Odin 323.36 MB 2024-10-01 N/A Download
G990EXXSCFXJ5/G990EOWOCFXJ5/G990EXXSCFXJ5 Odin 353.02 MB 2024-10-01 N/A Download
G990EXXSMHZB5/G990EOJMMHZB5/G990EXXSMHZB1 Odin 1.79 GB 2026-02-01 N/A Download
G990EXXSKHYK5/G990EOJMKHYK5/G990EXXSKHYK1 Odin 276.85 MB 2025-11-01 N/A Download
G990EXXS5EWC8/G990EOWO5EWC8/G990EXXS5EWC8 Odin 1.1 GB 2023-03-01 N/A Download
G990EXXU5EWC6/G990EOWO5EWC6/G990EXXU5EWC6 Odin 1.16 GB 2023-03-01 N/A Download
G990EXXS5EWD4/G990EOWO5EWD4/G990EXXU5EWD1 Odin 511.73 MB 2023-04-01 N/A Download
G990EXXU5EWD2/G990EOJM5EWD2/G990EXXU5EWD1 Odin 1.23 GB 2023-04-01 N/A Download
G990EXXUDGYD4/G990EOJMDGYD5/G990EXXUDGYD2 Odin 311.87 MB 2025-04-01 N/A Download
G990EXXSAFXI4/G990EOWOAFXI4/G990EXXSAFXI4 Odin 355.35 MB 2024-09-01 N/A Download
G990EXXSJHYJ4/G990EOJMJHYJ4/G990EXXSJHYJ3 Odin 317.59 MB 2025-10-01 N/A Download
G990EXXS4EWC6/G990EOLM4EWC6/G990EXXU4EWBA Odin 1.48 GB 2023-03-01 N/A Download
G990EXXU4DWB5/G990EODM4DWB7/G990EXXU4DWB7 Odin 1.92 GB 2023-02-01 N/A Download
G990EXXS4EWC2/G990EODM4EWBE/G990EXXU4EWBA Odin 1.49 GB 2023-03-01 N/A Download
G990EXXS4EWC1/G990EOJM4EWBD/G990EXXU4EWBA Odin 1.49 GB 2023-03-01 N/A Download
G990EXXU4EWBD/G990EOJM4EWBD/G990EXXU4EWBA Odin 1.49 GB 2023-02-01 N/A Download
G990EXXU4EWBE/G990EODM4EWBE/G990EXXU4EWBA Odin 1.49 GB 2023-02-01 N/A Download
G990EXXU4EWBF/G990EOLM4EWBF/G990EXXU4EWBA Odin 1.49 GB 2023-02-01 N/A Download
G990EXXSAFXI3/G990EOJMAFXG6/G990EXXSAFXI3 Odin 352.94 MB 2024-09-01 N/A Download
G990EXXSCFXL3/G990EOWOCFXL3/G990EXXUCFXK5 Odin 283.79 MB 2024-12-01 N/A Download
G990EXXSCFXJ3/G990EOJMCFXJ3/G990EXXSCFXJ3 Odin 335.49 MB 2024-10-01 N/A Download
G990EXXSAFXG3/G990EOWOAFXG3/G990EXXSAFXG3 Odin 889.45 MB 2024-07-01 N/A Download
G990EXXSIGYI3/G990EOJMIGYI3/G990EXXSIGYI1 Odin 2.09 GB 2025-09-01 N/A Download
G990EXXUCFXK3/G990EOJMCFXK3/G990EXXUCFXK1 Odin 290.88 MB 2024-11-01 N/A Download
G990EXXSCFYB3/G990EOJMCFYA2/G990EXXSCFYB1 Odin 261.7 MB 2025-02-01 N/A Download
G990EXXU3DVK8/G990EOWO3DVK8/G990EXXU3DVK8 Odin 1.85 GB 2022-11-01 N/A Download
G990EXXU3CVI8/G990EODM3CVI8/G990EXXU3CVI8 Odin 31.7 MB 2022-09-01 N/A Download
G990EXXU3CVH7/G990EOJM3CVH7/G990EXXU3CVH7 Odin 223.33 MB 2022-08-01 N/A Download
G990EXXU3CVG7/G990EOJM3CVG7/G990EXXU3CVG7 Odin 573.4 MB 2022-07-01 N/A Download
G990EXXS3CVJ6/G990EOWO3CVJ6/G990EXXS3CVJ6 Odin 2 GB 2022-10-01 N/A Download
G990EXXS3DWA6/G990EOWO3DWA6/G990EXXU3DVJ4 Odin 1.31 GB 2023-01-01 N/A Download
G990EXXS3DVK6/G990EOJM3DVK4/G990EXXS3DVK6 Odin 1.94 GB 2022-11-01 N/A Download
G990EXXU3CVH5/G990EOWO3CVH5/G990EXXU3CVG7 Odin 526.75 MB 2022-08-01 N/A Download
G990EXXS3CVI5/G990EOJM3CVI5/G990EXXS3CVI5 Odin 1.92 GB 2022-09-01 N/A Download
G990EXXU3DVK5/G990EOLM3DVK5/G990EXXU3DVJ4 Odin 1.99 GB 2022-11-01 N/A Download
G990EXXU3DWA5/G990EOJM3DWA5/G990EXXU3DWA1 Odin 1.92 GB 2023-01-01 N/A Download
G990EXXU3DVK4/G990EOJM3DVK4/G990EXXU3DVJ4 Odin 1.93 GB 2022-11-01 N/A Download
G990EXXU3CVG4/G990EOWE3CVG4/G990EXXU3CVG4 Odin 610.1 MB 2022-07-01 N/A Download
G990EXXU3CVG4/G990EOWO3CVG4/G990EXXU3CVG4 Odin 615.88 MB 2022-07-01 N/A Download
G990EXXS3CVH3/G990EOWO3CVG4/G990EXXU3CVG4 Odin 617.54 MB 2022-08-01 N/A Download
G990EXXS3CVG3/G990EOWO3CVG3/G990EXXS3CVG3 Odin 638.3 MB 2022-07-01 N/A Download
G990EXXS3DWA2/G990EOWO3DVK8/G990EXXU3DVK8 Odin 1.79 GB 2023-01-01 N/A Download
G990EXXU3CVG2/G990EOJM3CVG2/G990EXXU3CVG5 Odin 593.01 MB 2022-07-01 N/A Download
G990EXXU3CVG2/G990EOJM3CVG2/G990EXXU3CVG2 Odin 593.03 MB 2022-07-01 N/A Download
G990EXXU3DVL1/G990EOJM3DVL1/G990EXXU3DVL1 Odin 1.92 GB 2022-12-01 N/A Download
G990EXXS3DWAA/G990EOWO3DVK8/G990EXXU3DVK8 Odin 1.68 GB 2023-01-01 N/A Download
G990EXXS3DWAB/G990EOWE3DVK4/G990EXXU3DVJ4 Odin 1.74 GB 2023-01-01 N/A Download
G990EXXS3DWAB/G990EOWO3DWAB/G990EXXU3DVJ4 Odin 1.86 GB 2023-01-01 N/A Download
G990EXXSCFYA2/G990EOJMCFYA2/G990EXXSCFYA3 Odin 271.84 MB 2025-01-01 N/A Download
G990EXXUIHYJ2/G990EOJMIHYJ2/G990EXXUIHYJ2 Odin 319.01 MB 2025-10-01 N/A Download
G990EXXSCFYC2/G990EOWOCFYC2/G990EXXSCFYC2 Odin 261.07 MB 2025-03-01 N/A Download
G990EXXSCFXL2/G990EOJMCFXL2/G990EXXSCFXL2 Odin 285.44 MB 2024-12-01 N/A Download
G990EXXSBFXJ2/G990EOWEBFXJ2/G990EXXSBFXJ2 Odin 339.24 MB 2024-10-01 N/A Download
G990EXXSBFXJ2/G990EOWOBFXJ2/G990EXXSBFXJ2 Odin 361.66 MB 2024-10-01 N/A Download
G990EXXUAFXH2/G990EOWEAFXH2/G990EXXUAFXH2 Odin 350.96 MB 2024-08-01 N/A Download
G990EXXUAFXH2/G990EOWOAFXH2/G990EXXUAFXH2 Odin 354.45 MB 2024-08-01 N/A Download
G990EXXSKHYK2/G990EOJMKHYK2/G990EXXSKHYK1 Odin 316.36 MB 2025-11-01 N/A Download
G990EXXSEGYE2/G990EOJMEGYE2/G990EXXSEGYE1 Odin 293.21 MB 2025-05-01 N/A Download
G990EXXS2CVC8/G990EOJM2CVC8/G990EXXS2CVC8 Odin 1.21 GB 2022-03-01 N/A Download
G990EXXU2CVD2/G990EOWO2CVD2/G990EXXU2CVD2 Odin 1.18 GB 2022-04-01 N/A Download
G990EXXU2CVF1/G990EOJM2CVF1/G990EXXU2CVF1 Odin 618.24 MB 2022-06-01 N/A Download
G990EXXU2CVDA/G990EOJM2CVDA/G990EXXU2CVDA Odin 1.04 GB 2022-04-01 N/A Download
G990EXXUCFXL1/G990EOWECFXL1/G990EXXUCFXK5 Odin 279.44 MB 2024-12-01 N/A Download
G990EXXUCFXL1/G990EOWOCFXL1/G990EXXUCFXK5 Odin 285.15 MB 2024-12-01 N/A Download
G990EXXSLHZA1/G990EOJMLHZA1/G990EXXSLHZA1 Odin 269.08 MB 2026-01-01 N/A Download
G990EXXSHGYH1/G990EOJMHGYH1/G990EXXSHGYH1 Odin 266.82 MB 2025-08-01 N/A Download
G990EXXSGGYG1/G990EOJMGGYG1/G990EXXSGGYG1 Odin 282.16 MB 2025-07-01 N/A Download
G990EXXSFGYF1/G990EOJMFGYF1/G990EXXSFGYF1 Odin 288.59 MB 2025-06-01 N/A Download
G990EXXSCFYC1/G990EOJMCFYC1/G990EXXSCFYC1 Odin 259.48 MB 2025-03-01 N/A Download
G990EXXSBFXJ1/G990EOJMBFXJ1/G990EXXSBFXJ1 Odin 349.9 MB 2024-10-01 N/A Download
G990EXXSAFXH1/G990EOWOAFXH1/G990EXXSAFXH1 Odin 900.11 MB 2024-08-01 N/A Download
G990EXXSAFXG1/G990EOJMAFXG1/G990EXXSAFXG1 Odin 884.56 MB 2024-07-01 N/A Download
G990EXXS1BVB8/G990EOJM1BVB8/G990EXXS1BVB8 Odin 1.8 GB 2022-02-01 N/A Download
G990EXXU1CVC5/G990EOJM1CVC5/G990EXXU1CVC5 Odin 1.21 GB 2022-03-01 N/A Download
G990EXXU1BUL5/G990EOJM1BUL5/G990EXXU1BUL5 Odin 1.81 GB 2021-12-01 N/A Download
G990EXXU1AUJ4/G990EOWO1AUJ4/G990EXXU1AUJ5 Odin 2.38 GB 2021-10-01 N/A Download
G990EXXU1BUKA/G990EOJM1BUKA/G990EXXU1BUKA Odin 1.89 GB 2021-11-01 N/A Download

Device Specifications

NetworkTechnologyGSM / CDMA / HSPA / EVDO / LTE / 5G
2G bandsGSM 850 / 900 / 1800 / 1900
 CDMA 800 / 1900 & TD-SCDMA
3G bandsHSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
 CDMA2000 1xEV-DO
4G bands1, 2, 3, 4, 5, 7, 8, 12, 17, 20, 26, 28, 32, 38, 40, 41, 66 - International
 1, 2, 3, 4, 5, 7, 12, 13, 29, 25, 26, 28, 38, 39, 40, 41, 46, 48, 66, 71 - USA
5G bands1, 3, 5, 8, 20, 28, 38, 40, 41, 66, 78 SA/NSA/Sub6 - International
 41, 66, 71, 260, 261 SA/NSA/Sub6/mmWave - USA
SpeedHSPA 42.2/5.76 Mbps, LTE (5CA) Cat19 1600/200 Mbps, 5G
LaunchAnnounced2022, January 04
StatusAvailable. Released 2022, January 07
BodyDimensions155.7 x 74.5 x 7.9 mm (6.13 x 2.93 x 0.31 in)
Weight177 g (6.24 oz)
BuildGlass front (Gorilla Glass Victus), plastic back, aluminum frame
SIM· Nano-SIM
· Nano-SIM + Nano-SIM
 IP68 dust tight and water resistant (immersible up to 1.5m for 30 min)
DisplayTypeDynamic AMOLED 2X, 120Hz, HDR10+
Size6.4 inches, 100.5 cm2 (~86.7% screen-to-body ratio)
Resolution1080 x 2340 pixels, 19.5:9 ratio (~403 ppi density)
ProtectionCorning Gorilla Glass Victus
PlatformOSAndroid 12, up to 4 major Android upgrades, One UI 8
ChipsetQualcomm SM8350 Snapdragon 888 5G (5 nm) - Version 1
Exynos 2100 (5 nm) - Version 2
CPUOcta-core (1x2.84 GHz Cortex-X1 & 3x2.42 GHz Cortex-A78 & 4x1.80 GHz Cortex-A55) - Version 1
Octa-core (1x2.9 GHz Cortex-X1 & 3x2.80 GHz Cortex-A78 & 4x2.2 GHz Cortex-A55) - Version 2
GPUAdreno 660 - Version 1
Mali-G78 MP14 - Version 2
MemoryCard slotNo
Internal128GB 6GB RAM, 128GB 8GB RAM, 256GB 6GB RAM, 256GB 8GB RAM
 UFS 3.1
Main CameraTriple12 MP, f/1.8, 26mm (wide), 1/1.76", 1.8µm, dual pixel PDAF, OIS
8 MP, f/2.4, 76mm (telephoto), 1/4.5", 1.0µm, PDAF, OIS, 3x optical zoom
12 MP, f/2.2, 13mm, 123˚ (ultrawide), 1/3.0", 1.12µm
FeaturesLED flash, auto-HDR, panorama
Video4K@30/60fps, 1080p@30/60/120/240fps, HDR10+, gyro-EIS
Selfie cameraSingle32 MP, f/2.2, 26mm (wide), 1/2.74", 0.8µm
FeaturesHDR
Video4K@30/60fps, 1080p@30/60fps, gyro-EIS
SoundLoudspeaker Yes, with stereo speakers
3.5mm jack No
 32-bit/384kHz audio
CommsWLANWi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct
Bluetooth5.0, A2DP, LE
PositioningGPS, GLONASS, BDS, GALILEO
NFCYes
RadioUnspecified
USBUSB Type-C, OTG
FeaturesSensorsFingerprint (under display, optical), accelerometer, gyro, proximity, compass
 Samsung DeX (desktop experience support)
BatteryTypeLi-Ion 4500 mAh
Charging25W wired, PD3.0, 50% in 30 min
15W wireless
Reverse wireless
MiscColorsWhite, Graphite, Lavender, Olive
ModelsSM-G990B, SM-G990B/DS, SM-G990U, SM-G990U1, SM-G990W, SM-G990E, SM-G9900, SM-G990B2, SM-G990U2, SM-G990W2, SM-G990U3
SAR0.77 W/kg (head)     0.90 W/kg (body)    
SAR EU0.95 W/kg (head)     1.48 W/kg (body)    
Price$ 145.00 / € 249.44 / £ 159.99 / ₹ 37,999
Our TestsPerformance AnTuTu: 566529 (v8), 719696 (v9)
GeekBench: 3049 (v5.1)
GFXBench: 56fps (ES 3.1 onscreen)
Display 792 nits max brightness (measured)
Camera Photo / Video
Loudspeaker -26.9 LUFS (Good)
Battery (old)
Endurance rating 92h
Data source: GSMArena

More samsung Devices

Frequently Asked Questions

Q: Is it safe to flash official samsung firmware?

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.

Q: What tool do I need to flash Samsung Galaxy S21 FE (Asia/Africa) firmware?

A: Samsung Galaxy S21 FE (Asia/Africa) firmware is flashed using Odin. See the step-by-step guide above for the full procedure.

Q: Can I downgrade to an older firmware version?

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.

Q: What if flashing fails?

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.

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