Share your experience!
I updated my Sony Ericsson W150a and i have a big problem with my cell phone beacause the microphone is spoiled. In other web site i read a text where a person talk about the same problem.I didn't have this problem before the upset.
I think taht sony is a fantastic company but i'm too dissatisfied with this product because i have found a lot of problems, for example, the low volume of the headphones and the microphone's problem.
Please if you know a solution for my problem, please tell me it. 
Mr. Daniel
Well, the first thing you should try is updating/repairing the software via PC Companion.
http://www.sonymobile.com/update
If that doesn't work or solve the issues, send it in to an authorized service center for repair.