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Why did Sony decide to update the Xperia L to 4.2.2 but leave the Xperia SP and Xperia M on 4.1.2? The SP is the better phone then why not update that as well. Also if update the L then why not M?
PS. I know that the SP is due to get 4.3 very soon.
http://blogs.sonymobile.com/2013/07/25/on-android-jelly-bean-4-3/
Yesterday you probably saw Google announce the next version of Jelly Bean (Android 4.3) – we’re already getting stuck in and can confirm we’ll make 4.3 available for: Xperia Z, Xperia ZL, Xperia ZR, Xperia Tablet Z, Xperia SP and Xperia Z Ultra…
We’re also looking at uplifting some of our other devices running 4.1 direct to 4.3 – we’ll share more info / deets / timings when we can, so be sure to follow @SonyMobileNews for all the latest.
Why would you want to get 4.2 and push back 4.3?
This question was mainly aimed at Sony representatives but to counter what you said, if what you referred to was true then why did Sony release 4.2.2 for the Xperia L. What made the update worse was the the bugs 4.2.2 has.
The Xperia L its not going to receive 4.3.
Anything to back that?
That nearly gave me a heart attack. 
EDIT: Or are you trying to imply that 4.3 will be skipped and the next major version the L will receive (hopefully) is 4.4?
Check the official blog
http://blogs.sonymobile.com/2013/11/07/on-jelly-bean-4-3-kit-kat-4-4/
First up, Jelly Bean 4.3
We’re pleased to tell you that we’ll start rolling Android 4.3 for Xperia Z, Xperia ZL, Xperia ZR,Xperia Tablet Z, Xperia SP, Xperia Z Ultra and Xperia Z1 from next month*.
We also mentioned that a few of our products would be jumping software version – so, we can confirm that Xperia T, Xperia TX and Xperia V* will be upgraded to Android Jelly Bean 4.3… also from next month.
And, to Kit Kat 4.4
We’re also happy to tell you about the first raft of Xperia products that we’ll make Android 4.4 Kit Kat available for – they are: Xperia Z, Xperia ZL, Xperia Tablet Z, Xperia Z Ultra and Xperia Z1*.