Uniden Phone Dect1560

had this cordless phone for quite some time now phone was working all day battery was fine went out for valentine lunch with my husband can home battery was reading low thought my girl friend may have dropped it opened up the back of the phone andthought the batterymight be in wrong put the battery back in closed  the back call my local phone company they addvised me to replace the battery and i did wait 6 hours for the new battery to chare the charge light is on canot turn the phone on or push the key pad called the house #from cell phone number came across my television then called from cell to the voice mail is responding my girl friend tried to get into voice mail but didnt have pass code un plugged all the wires putthem back in nothing we been with the use of this BG382324399 Dect1560also tightened the electrical plate there is power to everything else can this be that she broke the phone and doesnt want to admit it or the lcd is broken but wouldnt u stii be able to dail on and the #? thanks Holly Maclean