1 Check your coverage area to make sure that you're in an area with cellular network coverage. 2  Restart your iPhone or iPad. 3  Check for a Carrier Settings Update. 4  Take out the SIM card and then put it back in. 5  If the SIM card is damaged, or doesn't fit in the SIM tray, contact your carrier. Check for a Carrier Settings Update. 2  Take out the SIM card and then put it back in. 3  If the SIM card is damaged, or doesn't fit in the SIM tray, contact your carrier.
Tinnitus is the medical term for hearing noises in your ears when there is no outside source of the sounds. Tinnitus is often called ringing in the ears, but it may also sound like blowing, roaring, buzzing, hissing, humming, whistling, or sizzling. The noises you hear can be soft or loud. You may even think you are hearing air escaping, water running, the inside of a seashell, or musical notes.
Tinnitus can arise in any of the four sections of the hearing system: the outer ear, the middle ear, the inner ear, and the brain. Some tinnitus or head noise is normal. A number of techniques and treatments may be of help, depending on the cause. 1  Some of the most common include a sound of crickets or roaring, buzzing, hissing, whistling, and high-pitched ringing. 2  Other types of tinnitus include a clicking or pulsatile tinnitus (the noise accompanies your heartbeat).