Remove SIM-lock patch generator

[ampeg115]

...To be sure that the phone is really unlocked, put a SIM card from another network provider. Another method to check the SIM-lock status is to access the service menu with >*<<*< key sequence, where: > - joystick right, < - joystick left, * - asterisk key near 0 (zero). Now go to Service Info menu, then SIM Lock sub menu. In case your phone is unlocked, all padlocks are open...

I eventually found why I can't see the unlocked status of the W580i. In the quoted is missing asterix (*) at the end. So the key's sequence should be > * < < *< * to reach the Service Info menu. For w580i, at least, it works.