The only guaranteed ways are either contacting Verizon Global Support (and you must have an active account in good standing with them for at least 6 months) or using a hardware dongle called SigmaKey which is $120.
Online unlocking services are “unreliable” as in, it depends on whether you're lucky enough to have a device with its unlock code unchanged.
Programmed Sun: DJ SUEE / e-Amusement Network: DJ XIAEX
Sony LT25i “Tsubasa” (stock rooted, w/locked bootloader).
Previously on “The Misadventures of a Certain Pettanko”: Sony J5, Sony Z5, Ericsson R520m, Ericsson T68, Motorola V547, Nokia 9300, Motorola DROID2 GLOBAL.
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