The long-promised, much-delayed mobile payment platform from the ISIS consortium of major carriers is now available nationwide. The NFC-powered proximity payment and mobile wallet system is compatible with 40 “ISIS Ready” smartphones from AT&T, Verizon and T-Mobile, the group says. But customers will need to get a new SIM card installed by their network provider in order to activate their devices for m-payment at participating merchants. The system is designed to work with the existing network of contactless payment....