@louisdi 's solution is the most practical, but here’s another (albeit full of “ifs” and “buts”).
If your home phone has voicemail, and it is capable of forwarding that voicemail as an e-mail attachment, you may be able to utilize a solution by forwarding calls to voicemail from your Republic Wireless phone to your home number:
Setup voicemail forwarding to your home phone number.
Setup your home phone voicemail to e-mail your voicemail, as an attachment, to an e-mail account that you retrieve from your phone (preferably a Gmail account).
Now all voicemail (home and cellular) will be received by your home phone voicemail and also be received as an e-mail attachment on your cellular phone. Your home phone should also ring whether or not the cellular phone is turned on or not. Like I said earlier, lots of “ifs” and “buts”, but doable in some situations.