Lg v10 h962 dual sim not standby

Hello my everybody, Happy July 4th to you all.

Please does any V10 H962 owner experience this same issue?

Please do you have an idea of what might be wrong with my phone. My dual sim is no long standby. Sim 1 usually get 4G LTE and Sim 2 Gets 3G and 2G voice. Now I can only use either Sim 1 or Sim 2 at once. When One sim on 4G LTE, the second sim will Not get signal/coverage until I switch back to other one. Pls what can I do? I have migrated from MM to Lollipop, still the same issue.
Please any help will appreciated.

Lg H962 after flash dead boot

Lg H962 after flash dead boot
Checking data...OK
Platform: LG Qualcomm
Selected port: COM871
Selected model: H962
Reading info...
Model ID: LG-H962
IMEI: 355213-07-013755-9
Android version: 6.0
Battery level: 5%
Mode: Emergency
Initializing flash...OK
SW version: LGH962AT-00-V20a-TWN-XX-APR-06-2016+0
LAF Version: 1.1
Product ID: YE02S151215006520
IMEI: 355213-07-013755-9
Target operator: GLOBAL
Hardware: rev_10
Opening "H96210b_00.oct"...OK
Setting options...OK
Reading partitions...OK
Formating USERDATA...Failed!
Writing PrimaryGPT...OK
Writing modem...OK
Writing pmic...OK
Writing sbl1...OK
Writing tz...OK
Writing sdi...OK
Writing hyp...OK
Writing rpm...OK
Writing aboot...OK
Writing sbl1bak...OK
Writing pmicbak...OK
Writing hypbak...OK
Writing tzbak...OK
Writing rpmbak...OK
Writing abootbak...OK
Writing sdibak...OK
Writing persist...OK
Writing sec...OK
Writing laf...OK
Writing boot...OK
Writing recovery...OK
Writing raw_resources...OK
Writing raw_resourcesbak...OK
Writing factory...OK
Writing system...OKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOKO KOKOKOKOKOKOKOKOKOKOKOKOKOKOKOKOK
Writing cust...OKOK
Writing BackupGPT...Failed!
Performed by 2.2.9 software version.



plz solution