Despite the warnings, cell phones are safe to use at gas pumps — and ExxonMobil Corp. aims to prove this in testing a mobile payment app for smartphone users in Nashville, Tenn.

At the 27 gas stations participating in the test, ExxonMobil has removed warning decals that cautioned against using cell phones as they fuel up. The Federal Communications Commission found no evidence that using a wireless phone in the presence of flammable materials is dangerous, ExxonMobil says.

Consumers can download the SpeedPass+ app from the Apple iTunes store or Google Play, or scan a QR code at the pump to initiate the download, the Irving, Texas-based company states in an Aug. 2 press release.

The mobile payment app complements the current SpeedPass program and the ExxonMobil Smart Card, which Citi began issuing a year ago as a replacement for the cobranded ExxonMobil MasterCard.

The mobile app will work with existing technology at the gas pumps, Exxon says.

When registering for SpeedPass+, customers link a credit or debit card and decide whether to receive printed receipts after purchasing gas. The app can link to any payment card.

The app includes a station locator and uses geolocation to detect and activate a pump for fueling, Exxon says.

SpeedPass+ complies with Payment Card Industry data security standards and operates with built-in authentication. Bank of America Merchant Services and First Data Corp. process transactions for ExxonMobil.

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