HTC One X+ is a upgraded smartphone based on HTC One X, as such an high end android phone, it is unbelievable it has the unable receiving Incoming call bugs. However, It is ture, recently a lots users who has gotten the One Plus from AT&T said the problem¬† normally occurs while the phone is connected to Wifi.¬† Basically whenever users are connected to wifi and surfing the web or using data, the phone will not accept calls or texts.¬† If someone trys to call the owners they get a busy signal or an unable to connect error.
And they are suggested going to the ATT store and get a new sim, but when they got a new SIM card, the issue comes out again. Also someone gives the following solution by Opening¬† dialer>Type *#*#4636#*#*>go to phone info>near bottom change wcdma preferred to wcdma only, unfortunately, this method still doesn’t work. (Read the article)