I've a Sony Ericsson XPeria Mini Pro with Android 2.3.3 and GTalk didn't came installed. I search it in the market and can't find it.
Is there any way to get it installed?
Odd that it wasn't pre-installed. I think your best bet would probably be to search XDA-Dev and install a separate Google Talk apk.
I thought that may be I could share the apk file through bluetooth from another phone and I succeed. Here are the steps:
All the steps are for the phone which already has GTalk installed.
Once Talk.apk is already in your phone, just click it to install the app.
I think (not sure) the second step requires rooting. Also I'm pretty sure that the native file manager doesn't allow you to go up from sdcard. I would need something like Es File Manager or Astro File Manager.