According to a report from Financial Times, carriers in Europe are stocking up on mini SIM cards designed for Apple’s next-generation iPhone in anticipation of the device’s expected October launch. In June, reports speculated that Apple’s nano-SIM design for the new 4FF standard was selected by the European Telecommunications Standards Institute, while hands-on video of the next-generation iPhone backs, which we first revealed in May, showed what appeared to be a smaller SIM card holder.

Today’s report from FT claimed Apple’s nano SIM card design is indeed the mini SIMs being purchased by European operators:

Operators expect that the iPhone will feature the nano sim in a slimmed down design, according to two sources with knowledge of the situation, and have begun to store millions of the cards in warehouses in anticipation of high demand for Apple’s iPhone. Apple declined to comment[Shocker]…

The report also claimed carriers are moving to avoid being “caught off guard by the adoption” of the new SIM standard, as was the case with the iPhone 4 and iPad:

Operators were caught off guard by the adoption of the micro Sim for the iPhone 4 as well as the original iPad two years ago, with some struggling to meet demand with their own micro-Sims in the first weeks of sale…. One informed person said that the major networks were keen to be ahead of demand this time, however. He added that the iPhone 5 was likely to be similar sized as the iPhone 4 although slimmer and with a fully metal body.