I have same problem:
Quote:
Chimera Mobile Phone Utility version: 21.22.1406 @ 2019-05-24
Printing phone history
Get Info
24/05/2019
05:28:11
p.
m.
Repair IMEI
24/05/2019
04:32:15
p.
m.
Repair IMEI
24/05/2019
04:30:20
p.
m.
Patch Certificate
24/05/2019
04:25:50
p.
m.
Patch Certificate
24/05/2019
04:21:30
p.
m.
Patch certificate started
Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-A750G
Sales Code: BVT
Country Code: Bolivia
Timezone: America/Havana
Android Version: 8.0.0 [R16NW] [SDK 26]
Build Date: Wed Jan 9 21:40:01 KST 2019
PDA Version: A750GUBU1ASA1 [january 2019, rev1]
Phone Version: A750GNUBU1ASA2 [january 2019, rev2]
CSC Version: A750GOWM1ASB1 [february 2019, rev1]
Product Code: BVT
HIDSw Version: A750GUBU1ASA1/A750GOWM1ASB1/A750GNUBU1ASA2/A750GUBU1ASA1
Board Platform: EXYNOS5
Modem Platform: SHANNON327
Serial Number: R28KA22WEEP
Imei: 359997000893226
Unique Number: CCU00B8EE4AF8A5
Connections: AT,MTP
Battery Status: 4.16V (87%)
Network Type: GSM
SIM Status: READY
Multisim Config: SS
Knox Version: v30
Warranty Bit: 0
Security Patch: 2019-01-01
Data Encryption State: unencrypted
Preparing...
Checking current patchcert.
Checking modem.
Checking root.
The phone is rooted by: 19.2:MAGISKSU
Checking boot image. Be patient! Do NOT disconnect the phone!
Reading data...
Checking modem version.
Reading data. Be patient! Do NOT disconnect the phone!
Unable to patch certificate.
Finished at local time: [05.24.19 13:30:05]
WorkID: 60615605
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Maybe with this firmware: A750GUBU1ARL3? Someone post succes with it.
Please help.BR