But they're of little use in sifting multiple databases--what if the customer has a second card with a different company?
You can add a microSD card next to the battery on the back, but it appears that the mysterious second card slot we saw in the earlier teardown only gave us false hope -- we couldn't find a way to get to it without prying open the housing.
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The Brumbies had been reduced to 14 men one minute earlier when prop Ben Darwin was shown a red card for his second yellow card offence.
Earlier, Junior Paulao scored as Real Betis moved up to third with a 1-0 win over Espanyol, who had midfielder Wakaso Mubarak sent off for a second yellow card in the second half.
Ismael Bouzid, who had been booked in the first half, avoided a second yellow card after tripping Barry Douglas early in the second half and the defender was soon withdrawn to be replaced by Andrew Driver.
Midfielder Caulfield received a second yellow card for a mistimed tackle on Kielt in the 13th minute.
Down sub Colm Murney was sent off after getting his second yellow card on 55 minutes.
He would have been ejected, as it would have been Balotelli's second yellow card.
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Referee Marco Rodriguez obviously saw the incident differently as he gave Estrada a second yellow card.
The visitors had substitute striker Stefan Maierhofer sent off in injury-time for his second yellow card.
You can get your second act card long before you finish your first act.
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But things started to go wrong for George Neill's side when Campbell got his second yellow card.
Diouf's second yellow card came after full-time as he allowed his annoyance with the officials to boil over.
Pompey midfielder Sean Davis was unlucky to be sent off with 10 minutes remaining after a second yellow card.
Moments later Ulughbek Bakaev was dismissed after picking up his second yellow card.
As the game headed to penalties, things went from bad to worse when Apam received his second yellow card.
Saul Molapo was sent off for a two-footed tackle and Tony Coyle after picking up a second yellow card.
The Dons' cause was further hampered when striker Miller was sent off after picking up a second yellow card.
Diouf was given a second yellow card after the full-time whistle for dissent.
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Scholes was sent off in the second half after he picked up a second yellow card following a clumsy tackle.
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The major talking point was Dundee midfielder Nicky Banger's sending off in the 52nd minute for a second yellow card.
Pablo Osvaldo and Erik Lamela got the goals before Federico Balzaretti was sent off after receiving a second yellow card.
The 20-year-old received a second yellow card from referee Mike Dean for tripping Spurs left-back Benoit Assou-Ekotto after 75 minutes.
Manchester United defender Jonny Evans will sit out Wednesday's game against San Marino, after picking up his second yellow card of the campaign.
Moments earlier, Uruguay's Martin Caceres was sent off after a second yellow card for a clumsy foul on Newcastle's Jonas Gutierrez.
Aidan Watson received his second yellow card after the break while stand-in keeper Surgenor made a fine double save from Rainey.
Danny Guthrie saw red for a second yellow card after the break, allowing the hosts to ease to a comfortable win.
Cambridge's afternoon went from bad to worse when Phil Bolland was shown a second yellow card for scything down Elliot Benyon.
His Hull counterpart Phil Brown, who saw his captain George Boateng dismissed for a second yellow card later in the game, disagreed.
Porto's Steven Defour was ejected after receiving a second yellow card for a late challenge on Joaquin Sanchez in the 49th minute.
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