I'm working with a client we inherited from another provider. They're on version 12.5 and are using Granstream GXP1505 phones. All of the phones have the same firmware version and they're all using the same provisioning template. For some reason, every week the same 3 or 4 phones ringtones are changing. Normally not a big deal, but the ringtone that's getting set is super loud and scares the crap out of people. I showed one of the tech savvy users onsite how to log into the phones to change it back, but she's having to do that almost every week. I haven't worked with Granstream phones much; was wondering if anyone has seen this or has any suggestions?