I have noticed a pretty big issue; this phone gets really hot. I haven't done anything more processor intensive than 3G browsing, but that alone makes the phone quite warm. This would be nothing more than a minor niggle except for the fact that the phone will stop you from adjusting the screen brightness above a certain level. I've attached two screenshots to show this.
In the twenty minutes between the first and second screenshots, the phone was accessing the network only intermittently. I wasn't actively running any apps in the background. Also, aside from when I tried adjusting up the brightness, the screen was only at 65%. Closing all recent apps from the multitasking menu seems to solve the issue temporarily, at least until the phone is used in a mildly intensive way once again.
PC Mag had this same issue when reviewing the phone
, but since no other reviewers noted it I assumed it was just an issue with their device.