Sprint is trying to offer its subscribers a smoother way to take advantage of NFC technology for making mobile payments. A new platform called Pinsight Touch promises to securely store and access a user’s credentials on a mobile device. Users with touch-enabled NFC, or near-field communications, smartphones can turn on the technology by answering “yes” to an opt-in question from mobile apps offered by credit card providers and other issuers. The user’s credentials are then securely shared with other trusted apps, Sprint said in a blog posted Thursday. Despite its push from mobile and financial companies, NFC has yet to truly take off. The slow adoption is partly due to the lack of widespread support across the various industries. But consumers have also expressed concerns over security issues involved in using their phones as mobile wallets.