Mobile service providers claim that this type of antenna does not work, and I have to agree with them. Installing it actually reduced my reception from 2 bars to NO bars! If you search the internet, you will find that passive antennas like this are no different than that battery compartment sticker that claimed to improve cell phone reception, block radio waves from frying your brain, etc. It doesn't work and it's a waste of money.I recommend buying a wired antenna that directly connects to your phone. If you phone doesn't have such a connection, then you may want to look into a different phone because nothing without a direct connection is going to work, and you may want to look into a phone that gets better reception (there are some -- just read the 3rd party reviews).I wouldn't recommend this product to anyone unless you just have money to burn. If so, please just send it to my PayPal account instead.