ugh my htc phone says that there is no bars what do i do?
Try going to an area where you have service. If you are in an open area where you know you should have service try restarting your device.
If this does nothing make sure you have the correct APN settings on your device. I cannot tell you yours since I do not have enough information, however, if you google search your device name plus your carrier apn settings then you will probably find a link to them.
Separate names with a comma.