How to unlock your phone
Many of us have phones that we no longer want to use with the company we bought it with, there are people who charge for this service, but if we can do it ourselves, why don’t we do it?
There are many tools on the web organized by mobile model, brand, company, etc., the ideal solution would be to find software that is compatible with the greatest possible number of brands so we don’t have to to be testing with this and that.

Universal SIM Remover is a program that is compatible with most major mobile brands such as Ericsson, LG, Motorola, Toshiba, Vitel, Mitsubishi, NEC, Nokia, Alcatel, BenQ, Siemens, SonyEricsson, Philips, Samsung, Sharp, VK. This program even has more options if you think it’s not enough.
What we need is quite practical, first the phone must be fully charged (remember that the system firmware is touched and we don’t want any problems) and the USB cable for that model, with this, just connect it and we can now begin.
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Source | Internizadohttp://www.internetizado.com/como-liberar-un-telefono-celular-de-su-compania-universal-simlock-remover/