Unlocking of PHS300 modem is supported now. Basically, PHS300 is manufactured by Prolink and identical in hardware if compare to ZTE modem MF190, and they can be unlocked by DC unlocker cracked version. Unlocking of Prolink PHS300 modem is so simple, but with a trick.
Basically, DC unlocker does not support Prolink modem. You will not find Prolink in Select Manufacturer drop down list. So you need to select ZTE Datacards (that’s the trick).
DC unlocker software is not free, DC unlocker team charges minimum 4 EURO to unlock any modem. So, don’t download the latest version software, only cracked version of DC unlocker software will work, so just follow the above-mentioned article link to download the DC unlocker unlimited credits software for free.