Two separate reports released today confirmed that the iPhone is selling well despite initial activation problems, and that Apple (NSDQ: AAPL) believes that it will continue to sell well after launching in various countries.

—T-Mobile International said it has sold more than 120,000 iPhone 3G devices since it went on sale July 11, Reuters reported. CEO Hamid Akhavan told German weekly magazine Focus that delivery problems and activation problems will be cleared by the end of the month, and despite those issues, “Our expectations were surpassed.” In Germany alone, the carrier sold 75,000 iPhones. To put that in some context, Apple said the official number of iPhones sold in the first weekend totaled 1 million.

—Apple expects to sell 3.5 million iPhones in Russia over the next two years, according to Reuters, who quoted market sources familiar with the deal being struck between Apple and Russian carriers. The estimates may be based on the 600,000-or-so iPhones that have flooded the black market in Russia through unauthorized channels. An official deal will likely be signed with Mobile TeleSystems, Russia’s largest carrier, with sales probably starting in October. Other carriers Vimpelcom and MegFon are also talking to Apple, Reuters said. Eldar Murtazin, an analyst with Moscow-based Mobile Research Group, said based on conversations he’s had, he expects “total sales by the Big Three carriers will amount to 3.5 million iPhones within the next two years.”