buenas probe la nueva actualizacoin de chimera al dia de hoy j260m bit 7 imei reparado ok.
pasos
desbloquear oem conectando wifi
root con odin en ap ROOT-J260M-U3-Android 8.1.0 Oreo File By (Support.HalabTech.Com)
el telefono queda colcado en el logo hacer un reset manual
bajar magisk manager apk 7.4.0
reparar imei
parchar
y listo saludos.
Doy fe que el aporte del colega @leo22ar si funciona de maravilla siempre y cuando tengan la version de chimera que el usa en este procedimiento... Aqui dejo mi log y no hubo necesidad de flash el firmware que el usa en la operacion...
Chimera Mobile Phone Utility version: 23.87.1333 @ 2020-02-13
Printing phone history
Repair IMEI
14-Feb-20
12:40:15
AM
Repair IMEI
14-Feb-20
12:37:36
AM
Repair IMEI
14-Feb-20
12:21:12
AM
Repair IMEI
13-Feb-20
10:05:50
PM
Repair IMEI
13-Feb-20
9:59:31
PM
Patch certificate started
Unable to detect IMEI number and baseband version. It seems that the modem does not work or the network is unavailable/disabled.
Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-J260M
Sales Code: DOO
Country Code: DOMINICAN REPUBLIC
Timezone: America/Wakanda
Android Version: 8.1.0 [M1AJB] [SDK 27]
Build Date: Tue Oct 29 05:46:20 KST 2019
PDA Version: J260MUBS7ASJ6 [october 2019, rev6]
Phone Version: J260MUBU7ASK1
CSC Version: J260MOWO7ASJ1 [october 2019, rev1]
Board Platform: EXYNOS5
Modem Platform: SHANNON305
Serial Number: R28K92CY9DV
Battery Status: 3.83V (30%)
Network Type: GSM
SIM Status: READY
Multisim Config: SS
Warranty Bit: 0
Security Patch: 2019-11-01
Data Encryption State: unsupported
Preparing...
Checking root access.
The phone is rooted by: 19.1:MAGISKSU
Reading data...
The operation is in progress. Be patient! Do NOT disconnect the phone!
Patching certificate...
Checking root access.
About 30-90 seconds after the phone starts, the signal strength indicator turns OFF and then turns ON again after a few seconds.
You can check the status of the imei using: *#0011#
The patchcert can be removed by repeating the process.
If a new firmware is used, the patchcert process must be repeated.
Successfully finished.
Finished at local time: [02.13.20 18:43:19]
WorkID: 89754545