This is very strange behavior. Butttt can that issue be exploited to open a back door into the root since this is obviously writing to the ROM if it actually persisting after a hard reset?
It could be possible, or it could be the phone just misreporting available storage memory.
I believe the reason the sms/voicemail issue occurs is because the system intentionally puts up a remote flag to not send any sms/voicemail while low on memory. The problem lies that when you free up memory even if you hard reset the phone it doesn't take down the flag it down unless you change to a phone that communicates the flag already down. That's just my understanding so I could be totally wrong!
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