The weekend of the HTC EVO 4G has passed, and it appears to have been a very successful launch for Sprint – at least in terms of device sales.  A press release issued by Sprint today reports that the EVO 4G broke sales records for Sprint on launch day.

According to Sprint, “Friday sales of HTC EVO 4G marked the largest quantity of a single phone sold in one day every for Sprint.”  The company also notes, that the total number of units sold on launch day was “three times the number of Samsung Instinct and Palm Pre devices sold over their first three days on the market combined.”

The EVO 4G was available at 22,000 locations nationwide, including Sprint’s retail stores, Radio Shack, Best Buy and Walmart.  The phone quickly sold out in most locations nationwide, although Sprint claims that it’s working with HTC to “increase inventory in all sales channels.”  Many stores, according to Sprint, are receiving new EVO 4G shipments on a daily basis.

Despite record sales figures, Sprint did suffer from a number of issues during launch day.  I personally experienced a two hour wait as Radio Shack attempted to activate my EVO 4G on Sprint’s overloaded device activation system.  Later that day, Sprint stores in the Bay Area went completely offline, and were unable to process any sales transactions.  I couldn’t even purchase a case for the EVO 4G – Sprint reps told me they expected their systems to come back online in a few hours.

Speaking of accessories, there wasn’t much selection available on launch day.  Sprint only had a few cases available, none of which were particularly exciting.  Best Buy had a Seido Platinum case available as well, although most of the stores we visited were sold out of all colors except purple.  The HDMI car and desktop docks for the EVO 4G were not available either.  Sprint representatives gave a July timeframe for the release of these accessories, although no firm release date was available.

Our sister site iGear360 has reviewed several cases for the EVO 4G.  Check them out here.

The Qik app for the EVO 4G also suffered from high demand for the device.  According to CNET, the Qik app was initially unavailable in the Android Market, and when the app was finally available for download Qik’s servers were hit with 20x the normal workload.  This caused connectivity issues for Qik users, forcing the company to pull the app until additional server capacity was added.

Although it was a rough weekend for some EVO 4G owners, reviews of the device have been generally positive.  As far as we can tell, there were no major issues with the EVO 4G, although HTC did issue a firmware update for the EVO 4G on launch day that fixed memory card recognition issues.