According to Flurry Analytics, a total of 6.8 million iOS and Android devices were activated worldwide on Christmas Day — that’s a 353-percent increase from Christmas Day 2010. Google’s Andy Rubin claims that 3.7 million Android devices were activated on Christmas Eve and Christmas Day. Based on those two numbers, its speculated that the total number of iOS activations on December 25 was at least 4.2 million. Needless to say, Apple saw a very lucrative holiday season.

To some degree, GameStop’s holiday season in regards to iOS devices was just as lucrative. According to the retailer, the current trade-in program — which provides up to $180 for an iPod Touch, up to $300 for an iPhone and up to $400 for an iPad — has exceeded the company’s expectations. However the drawback to this program is that iOS owners can’t get cash for their used device — they receive in-store credit instead.

“We expect to see strong post-holiday traffic as customers trade in older models that were replaced by gifts,” stated GameStop president Tony Bartel without providing actual pre-Christmas trade-in unit numbers. The company expects to continue to expand the availability of GameStop refurbished devices for sale in select stores and online.

GameStop’s iOS trade-in program began back in September and has since seen “strong consumer enthusiasm for the program.” Naturally consumers can also purchase pre-owned iOS products like the 8 GB iPhone 3G or $149.99, the 16 GB iPhone 4 for $369.99, an original 32 GB iPad Wi-Fi only bundle for $424.99 and a 32 GB iPod Touch Gen 3 for $189.99. The 1 GB iPod Shuffle Gen 2 costs a mere $19.99.

GameStop also provides a load of Android-based tablets too like the 7-inch Acer Iconia, the Asus Eee Pad Transformer and Transformer Prime and the Samsung Galaxy Tab. As of this writing, the sub-$400 tablets are all sold out.