Hm.. nevermind, looks like even if a an overlay SIM siging chip could be put in a feature phone getting it to work with a USSD app isn’t going to work. Best bet for a non-custodial solution is probably future very budget smart phones with NFC.
Hm.. nevermind, looks like even if a an overlay SIM siging chip could be put in a feature phone getting it to work with a USSD app isn’t going to work. Best bet for a non-custodial solution is probably future very budget smart phones with NFC.
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