Sorry to repeat this again but this problem is really bugging me right now.

[QualityThomas]

Could someone answer the question in the most called
"Why won't my Alcatel One Touch Fierce 2 detect Wifi Network suddenly?"

 

[SpookDroid]

Unfortunately not much to go on with just that... Might be a hardware failure (WiFi antenna just failed) or a software bug. I'd try to boot your device in Safe Mode to rule out that any 3rd party apps are interfering. Not sure if this device has a self-diagnosis menu in the settings; you could try that too if it's available.