I know this is an old thread but it's worth a try.
Maybe someone here can help.
My monthly average data usage over the past 4 years is 300-600 mb. Yeah it's an older phone, but I really like it and it fits my needs perfect.
My plan automatically changed effective 11/24/14. 2gb Family Share, I'm the only one on it.
#1 On 11/25/14, a relative stopped by telling me to check my phone, my son (1,200 miles away) had been trying to call and/or text me since 11/24,.
She called me while I was standing there, her call went right to voice mail. My phone was on and had signal, never rang.
I called Sprint they did something and within 20 minutes everything was fine.
#2 on 12/2/14 I get text messages from 11/25 & 11/26 and on 11/27 the last telling me I am over my data roaming allotment. I used 207mb in the first 24 hours of the phone working and 70+mb the next day. I can't recall ever going over (I know Sprint has tightened down) I just don't use much data.
Talking to Sprint customer service went know where, one gal even commented "This doesn't make sense" but she couldn't do anything. I went to a local store, they checkled and there were no network issues in the area I was in for those two days. I was home and actually on WiFi, plus I can see the Sprint tower from my backyard so even if I was on data I can't believe I was roaming.
I've been told changing plans can't make this happen, OK well something is amiss.
Any help/suggestions would be greatly appreciated.
Dave