Unhappy help! Seeking baseband - read explanation

- hello explain everything slowly Venezuela live and buy a mobile optimus 3d to a relative in your settings options etc claiming to be a: P925 ICS

but was purchased in telephony ((movilnet)) purchase in the box says it was p920h GSM 850/900/1800/1900, WCDMA 850/1900/2100

apparently my family will change the rom or software

my simcard is working with Venezuela digitel network gsm 900mhz and 900 mhz wcdma 3g


I'm looking for a compatible version with my baseband frequency using 900mhz and 900mhz wcdma gsm

I tried with 3 different base band

-v30b v30c and have good coverage but do not lift gsm 3g

- V30A bad gsm coverage only one line of coverage but if I recognize the 3g but too slow

can someone help please T__________T