[Galaxy Tab 8.9 Android Development] VeEuzUKY:
I had this previous ROM installed and made a backup (I'm still running Beta 8). Did a full wipe and installed the P7300ZSLP7 ICS stock+rooted+voice calls ROM to try it out and also updated the modem to I9103XXLQ3. Calls worked fine with the ICS ROM. But cant stand ICS after using Jelly Bean. Also, the Tab's native DPI is 160 and ITS A MYSTERY TO ME, how ANYONE can live with this DPI because just about ALL the apps (at least the ones I use) in one way or the other are ALL wrongly scaled and font with weird sizes.. from CNN to Fox News, Photo apps and other stuff, its all wither too bog, too small or on the wrong place on the screen. So, for me 240 DPI is the settings that makes things all look right again (just like the original Galaxy tab 7, that I still have and use every day). However changing DPI to anything else but 160 in ICS, strangely makes several native apps totally disappear (phone, contacts, camera and others for example)..so, that makes ICS to me unusable. I posted questions on this issue on other threads but no one provided me with a proper answer as to why this happens.

So I did a full wipe again and restored my backed-up version of this ROM (wiped all caches after the restore before the boot-up). I run this ROM at 240DPI.

After this, all GSM calls work with Beta 8 now flawlessly.

Noted changes in my particular configuration aside that DPI is set at 240, are: I'm using an older launcher (LauncherPro), use Extended Controls as my main Power Settings tool to go around the Brightness and Sound Controls FC bugs in Settings, and because I lost the bottom navigation bar (and the Tab doesn't have hardware keys) I use Button Savior (v1.63a) to give me the navigation keys functionality

..though surely none of this has nothing to do with the ROMs ability to handle calls.

I noticed however one strange issue that is bothering the living hell out of me since yesterday after restoring this ROM from ICS. Not sure if its coincidence or "something" I did on settings or configuring of the Tab, but, when the Tab is on and is charging and the screen goes off after the default period (or I manually turn it off via the power button), within a few minutes the Tab it turns itself off/crashes and the large charging battery icon screen comes on. If I the press the power, a normal cold reboot starts. I re-started the Tab many times changing settings (with WIFI on/off and Wireless also on/off) and nothing seem to make any difference. I only noticed this happening now and it bothers me because I cant use the Tab if its charging basically as long as the screen dims and turns off or I press the power button to turn screen off manually.. the Tab will turn itself off while the screen in black. Sometimes is instantly, sometimes after a few minutes.. I'm trying to troubleshoot this now and see if there are any settings that can change this behavior. So far, no luck. I'm thinking on doing a full wipe and installing Beta 13 though I really dont think it will make a difference on the issue..

So with the exception of this new power problem when charging, GSM calls work flawlessly (aside that they mute and die when screen dims and goes off).. I'm trying to find a solution for that later on today or tomorrow..