It's not my idea, I got it from CSW. What I did was download a HANDCASH wallet to an older but still smart phone and just stripped off all the other apps. Sent my BSV to that account checked that it went through OK, then turned off the WiFi and turned off the phone. I occasionally turn it on to check for updates with HANDCASH and the phones OS and to top up my moneybutton account. Not sure what else to tell you, it really is pretty low-tech simple.
It's not my idea, I got it from CSW. What I did was download a HANDCASH wallet to an older but still smart phone and just stripped off all the other apps. Sent my BSV to that account checked that it went through OK, then turned off the WiFi and turned off the phone. I occasionally turn it on to check for updates with HANDCASH and the phones OS and to top up my moneybutton account. Not sure what else to tell you, it really is pretty low-tech simple.