Please how do I unlock VDF 527 phone

Please I need information about how to unlock the Vodafone 527C phone. It reports SIM LOCK all the time. I'll be very glad if someone could help me with the unlocking code.
The fone particulars are:
IMEI: 35926202503629-7
IMEISV: 01
Vodafone 527C - BX2998S2+
F154/09 - N1
SAGEM - made in China

There can be many ways to Unlock your phone. As far as I know unlocking by codes is the simple and safe way. I will suggest the website Unlock-Zone.com which is doing good service and they were recommended highly in the cell phone forums.
I used them to unlock my cell phone. contacted them and within 30 mins I had my unlock code and my phone was unlocked.
Hope this helps.