Why can't I hear the person calling me on doro 6520 mobile phone. It was ok when I bought it about 6 weeks ago

SOURCE: when someone calls I can't hear the person unless I use my hands free device

That person can use the headset or loud speaker

SOURCE: Magicjack

Question: is the magicJack plugged directly into the USB port on the computer or through a USB hub? If it's plugged into a hub, try plugging it directly to the port on the machine.

SOURCE: I cannot hear the person or persons that I'm talking to.

first they are not a phone, they are a 2 way radio walkie talkie and will not work for telephone communication.

SOURCE: The ear piece of My HTC touch Diamond 2 bought

nolia 3230 camra not working system error please help me?

SOURCE: I can only hear sounds when phone is on Speaker Phone.

In this case check the volume of you're Handheld, If it is low, Increase the volume and check still if it is not working you need to walk into the service center to check the speaker of you're Handheld.