I have a prepaid basic daily plan (pay-as-you-go, voice and text only, no data plan). When I log in to My Verizon to view my usage, I can only see usage data going back to March 17, 2014, even though I've been using the phone continuously for many months. When I click the button "previous 24 calls," the same list of calls is displayed, nothing earlier than March 17, 2014. I have been using this same phone and account for 2 years. How long are my usage details being retained?