That Update seems stable on most devices, although it dosen't work ok on some. Problems and issues are the 3G and WiFi dropping out, and way to fix it is to re-boot or airplane mode. Also that seems most early released Mercurys are being recalled for some technical issues in which Cricket will not disclose. Only thing they have mentioned is software and some minor hardware problems. Phones purchased in 3rd and 4th Quarters seem to be working just fine; but 3rd Q some hit and miss with same problems.