Sony had earlier promised Android 4.1 update to all Xperia phones released in 2012.
The list of devices that will be getting the Android 4.1.2 update include the Xperia P, Xperia Go, Xperia S, Xperia SL, Xperia acro S and the Xperia Ion. Exact date for the update will be known by next week.
Sony has announced Xperia E4 and Xperia E4 Dual but has not revealed their prices yet.
There is also a dual SIM version of the phone, simply known as Sony Xperia E4 Dual.
Sony Xperia L was introduced in India in mid-May last year for Rs 18,990.
Apart from SIM slots, the new handsets are identical in terms of specifications.
Sony Xperia Z Ultra Google Play Edition is priced at $650 (Rs 39,846 approximately) and runs Android 4.4 KitKat without customisations.
Sony has also announced that it will release Android 4.4 KitKat update for some of its high end devices.
Sony is reportedly working on a mini version of its Xperia Z1 smartphone which may be launched as Xperia Z1S.
The Android 4.1 powered smartphone has a 1 GHz dual core processor and 1 GB RAM.
The employees have been given clear instructions not to let information out before launch of devices.
In the last couple of days we witnessed a pitched sales battle between Samsung and Sony. First it was smartphones and now it is smart watches.