Fellow attendees at the Mobile World Congress in Barcelona agree that this week so far has featured a battle of the biometric solutions. From Samsung's well-received new touch sensor on the curvy Galaxy S6 edge to Fujitsu's iris-enabled smartphone and XTE's integration of eye-vein recognition, the surge in biometric innovation has been significant.The proliferation of biometrics on mobile devices will likely have positive implications across the broader industry – greater public knowledge and usage should foster a stronger awareness of the technology's benefits and limitations. This will become more important with ultrasonic innovations such as Qualcomm's new fingerprint sensor – which can read through metal – also highlighting how the tech could become increasingly less intrusive and visible.The need for greater awareness is highlighted by developments like the newstoday that Apple Pay fraud is already a reality. This could be seized upon as a damaging trend for the future of biometrics payments, even though this is a case of identity fraud working outside the secure loop of tokenisation and templates.Scare stories about potential data and privacy breaches linked to biometrics will multiply as public use of the technology grows. Perhaps the best way to counter misinformation is to redouble the industry's already strict focus on privacy and security at the design, development and post-sale stages.How digital identity intersects with the mobile biometric solutions being showcased at MWC is a key theme being explored at the upcoming connect:ID event in Washington – all the more reason to make sure you attend.