This Happen When I went back home this summer to see my family..
well I never meet my dads mom or anything but always wondered what she was like.. well I went to walmart to gets some flowers to put on her grave and my grate aunts who died and was barred the day before..
I was on my way to the grave yard and my cell rang.. I missed that call, it was unavailable.. so I could not call it back. THEN when I was already at the gravy yard, driving to her grave which was a little ways from the gate it rang again and it said unavailable, AGAIN.. (Keep in mind before the cell rang I was thinking of my grandma rosa) I was like hmmm.. knowing it was my mom cell I picked it up thinking it was my husband calling from Germany (I left out early to spend more time with my parents and the cell some times showed up unavailable when he called my moms cell) or some one she knew (she tag me with her cell as soon as I got off the plane lol)
WELL I picked it up and said Hello.... And all i heard was static...and then it stoped... usually when something like this happens I FREK, but I was calm and I was like thats odd... So I called my hubby and asked if he called.. he said no he was sleeping.. Then I got to thinking of white nose and I was like.. maybe it was grandma rosa calling me, telling me she knows I think of her. I put the flowers on her grave and my grate aunts and went home and was messing with my moms phone, for some reason.. and GUESS WHAT!! My phone recorded it!! I WAS LIKE WTH!! Now I know I am not CRAZY!!!
I told my dad and mom what happen and let them listen to what the cell recorded.. which was a LOUD and Soft static and pops, as if some one was talking, kind of..My dadvsmiled and said maybe it was her telling you she and her sister is ok

... I was like maybe..