[LG Optimus 2x] owain94:
here are the commits between those date that i do not have in my build

Change I93d3d985: Smdk4210RIL: added support for hd-voice (wideband amr) http://r.cyanogenmod.com/#/c/18476/

Change Ic715d1f7: Smdk4210RIL: some cleanup http://r.cyanogenmod.com/#/c/18496/

Change I117a38f7: strict-aliasing fixes from linaro wilhelm: fix aliasing violations http://r.cyanogenmod.com/#/c/17388/

Change I16015d29: telephony: update stk service functionality for Samsung phones http://r.cyanogenmod.com/#/c/18298/

Change I733a635e: Add SamsungCDMAQualcommRIL class for CDMA Galaxy S III family based on msm8960. http://r.cyanogenmod.com/#/c/18352/

Change I5ab1720f: Fix for GCC 4.7.x http://r.cyanogenmod.com/#/c/18575/

Change I0ffb35da: input: add keymapping and handle www/com key for keypads in ics http://r.cyanogenmod.com/#/c/18381/

Change I99cb6e12: wilhelm: Fix pointer mis-assignments http://r.cyanogenmod.com/#/c/18599/

i know for sure that these can't cause problems with the data connection on the p99x devices

Change I0ffb35da: input: add keymapping and handle www/com key for keypads in ics http://r.cyanogenmod.com/#/c/18381/

Change I5ab1720f: Fix for GCC 4.7.x http://r.cyanogenmod.com/#/c/18575/

Change I99cb6e12: wilhelm: Fix pointer mis-assignments http://r.cyanogenmod.com/#/c/18599/

Change I117a38f7: strict-aliasing fixes from linaro wilhelm: fix aliasing violations http://r.cyanogenmod.com/#/c/17388/

and these are in a completely different RIL that the p99x doesn't even use

Change I93d3d985: Smdk4210RIL: added support for hd-voice (wideband amr) http://r.cyanogenmod.com/#/c/18476/

Change Ic715d1f7: Smdk4210RIL: some cleanup http://r.cyanogenmod.com/#/c/18496/

Change I733a635e: Add SamsungCDMAQualcommRIL class for CDMA Galaxy S III family based on msm8960. http://r.cyanogenmod.com/#/c/18352/

that leaves this one for us

Change I16015d29: telephony: update stk service functionality for Samsung phones http://r.cyanogenmod.com/#/c/18298/

and if you take a look at that change it is a huge one and completly not needed for the p99x

M	core/res/res/values/config.xml	+3, -0	Side-by-Side	Unified
M	telephony/java/com/android/internal/telephony/CommandsInterface.java	+7, -0
M	telephony/java/com/android/internal/telephony/IccSmsInterfaceManager.java	+13, -0
M	telephony/java/com/android/internal/telephony/RIL.java	+37, -0
M	telephony/java/com/android/internal/telephony/RILConstants.java	+1, -0
M	telephony/java/com/android/internal/telephony/Smdk4210RIL.java	+1, -1
A	telephony/java/com/android/internal/telephony/cat/CallControlResult.java	44 lines
M	telephony/java/com/android/internal/telephony/cat/CatService.java	+119, -8
M	telephony/java/com/android/internal/telephony/cat/CommandParams.java	+11, -0
M	telephony/java/com/android/internal/telephony/cat/CommandParamsFactory.java	+57, -29
M	telephony/java/com/android/internal/telephony/cat/ValueParser.java	+67, -0
M	telephony/java/com/android/internal/telephony/cdma/CDMAPhone.java	+1, -1
M	telephony/java/com/android/internal/telephony/gsm/GSMPhone.java	+2, -1
M	telephony/java/com/android/internal/telephony/sip/SipCommandInterface.java	+12, -0
M	telephony/java/com/android/internal/telephony/test/SimulatedCommands.java	+17, -0
+392, -40

this might can give us a NullPointerException when trying to get data

can somebody try to revert that commit and then build?

here is the code to revert it

cd to your workfolder/framework/base
git revert 53757cff2b2d04219c7fdc9bc977af0aa351f64e