J260A unlock not supported?

Waiting ADB device... OK
Reading phone info...
Model: SM-J260A
Android version: 8.1.0
PDA version: J260AUCU1ASC6
CSC version: J260AATT1ASC6
Phone version: J260AUCU1ASC6
Product code: SM2J260AZKCATT
CSC country code: USA
CSC sales code: ATT
Phone SN: RF8M50SYVXB
IMEI: 357177100305064
HW version: REV1.0
RF cal date: 20190507
Chip name: EXYNOS7570
Modem board: SHANNON305
Security patch: 2019-03-01
Boot Warranty bit: 0
SIM State: NETWORK_LOCKED
This phone is ATT and unlock is not supported by this method
Done with Samsung Tool PRO v.36.2