LGA175a Failed Unlock

The box shows that it connected properly and says it is unlocked, however the phone will not accept any sim cards from other companies. Essentially, nothing changed. Also, as i dont have the original sim card, i cannot use the input code method.

Welcome to Octoplus/Octopus Box LG Software version 2. 1. 6
Platform: LG Infineon
Selected port: COM4
Selected baudrate: 921600
Selected model: A175a
Please, disconnect battery and connect cable…
Phone found.
Sending preloader… OK
Sending loader… OK
Reading info. Please wait…
Flash ID: 20002888
Flash type: ST
IMEI: 012624-00-477303-5
Reading security area… OK
Backup saved to "A175a-***************_25-01-2016_13-12-37. eep"
Writing security area… OK
Phone successfully unlocked!