What is the latest software?

[Sony6million]

I have A19 software for a gd87 phone. The panasonic service centre said they would upgrade it to A39. But Ive seen someone mention A50, so what is the newest version?

[kingmobilephone]

A53 from what I know at the moment

[Sony6million]

So what is the difference between that and A19?

[kingmobilephone]

what I know one of the major different is

u can store 200 text message in A39, A53 ...

For A19

when u press REVIEW in SMS menu.
u can only get the memory storage from SIM..which is about 10-20

FOR A39, A51

when u press REVIEW in SMS menu
u will see 2 items , MOBILE & SIM
and for MOBILE ....u will see the storage is 200
for SIM still the same

...BUT There are still a lot of different which I didn't know..

happy if someone can share what they found