Is the room for the headphone jack too small for the regular headphone jacks on this phone? I can't insert headphones all the way in. Some go in but are very loose (can hear but fall out really easily) and others go in but won't stay in place (have to hold it in to hear.) They don't go in all the way either. Is there a special kind of headphone for this phone, or is the port just too small, and I'll have to deal with this?