g531h no 3g after CERT

[ 30/12/2015 12:01:00 p.m. ] Model: SM-G531H
[ 30/12/2015 12:01:00 p.m. ] Android version: 5.1.1
[ 30/12/2015 12:01:00 p.m. ] Product code: SM-G531HZWDTTT
[ 30/12/2015 12:01:00 p.m. ] Phone version: G531HUBU0AOJ2
[ 30/12/2015 12:01:00 p.m. ] PDA version: G531HXXU0AOG1
[ 30/12/2015 12:01:00 p.m. ] CSC version: G531HOJV0AOG3
[ 30/12/2015 12:01:00 p.m. ] CSC country code: Nigeria
[ 30/12/2015 12:01:00 p.m. ] CSC sales code: ECT
[ 30/12/2015 12:01:00 p.m. ] HW version: MP 0.300
[ 30/12/2015 12:01:00 p.m. ] Phone S/N: R51G93LDW8E
[ 30/12/2015 12:01:00 p.m. ] Modem board: SC7730SE
[ 30/12/2015 12:01:00 p.m. ] RF cal date: 20150925
[ 30/12/2015 12:01:00 p.m. ] IMEI:
[ 30/12/2015 12:01:00 p.m. ] Checking Super user right… true
[ 30/12/2015 12:01:00 p.m. ] Writing CERT… OK
[ 30/12/2015 12:01:00 p.m. ] Writing Slave CERT… OK
[ 30/12/2015 12:01:00 p.m. ] Rebooting phone… OK
[ 30/12/2015 12:01:00 p.m. ] Write CERT done

after succesfull CERT WRITE the phone now dont have 3g network (WCDMA), only 2g (E)

how can i fix this? :confused: