Having an Dell Inspiron 1525 Windows Vista Premium, how and where can I get Wi-Fi? because I need internet!!!!?

I really don't know if this laptop has Wi-Fi, but I installed a software to check and then from my Android LG cellphone I tried to take the signal on my laptop, but there's something wrong here. What can I do? And also ... the cellphone doesn't recognize the bluetooth for at least connect via bluetooth dongle.