Samsung Galaxy S2 drops carrier network My SGS2 is dropping it's network connection multiple times a day without any notification.  The signal bars disappear and it just says NO SERVICE/VODAFONE NZ. No data, no 3G, no 2G, nothing...

I was previously on Gingerbread 2.3.6 and was hoping that CyanogenMod would fix the issue.  I flashed it to CM 10.2 but the same issue remains.  This makes me think it is a hardware issue and not a software issue, however it did not wipe my internal SD card - could there be settings in there that are causing this?

It seems to really love the ground, so I'm wondering if it has just been dropped one to many times and cracked some solder connections somewhere internally?

UDPATE

Installed the GetRIL tool and it said the stock RIL was unknown.

I installed the first RIL on there.  It said that it would backup the stock RIL.  The one I installed didn't work so I installed another one.  That didn't work either.  So I tried to restore the stock RIL but then I read in the FAQ it only restores the last one installed.

So it restored the broken RIL.  And now I have no network and can't figure out how to get the stock one back.  Yay.

Here's the stock details:

RIL: Unknown - 163ecafa01912637fe344ec1f8264d70
Baseband: I9100XXKE7


Anyone know how I can get the stock RIL back?

As an aside: the battery lasts sooooo long without the carrier network

UPDATE

Reflashed with CyanogenMod so I got my stock RIL back.  Still monitoring the network drops.
I have had the exact same problem.  CyanogenMod SGS2, baseband I9100XXKE7, checksum 163ecafa01912637fe344ec1f8264d70.  The only difference is I'm with Optus in Australia.

After extensive research, the solution I found was simply a matter of identifying an appropriate Modem+RIL (Radio Interface Layer) to install.  I'm still looking for an appropriate one for me, although I9100XXLS9 has stopped the dropouts, it won't let me make calls.

Unfortunately it seems the best Modem+RIL combo is very dependent on your carrier+phone combo.  I found a discussion about various RILs to use for SGS2 in New Zealand.  You may find what you're looking for there.  I've seen people discussing I9100JJLS2, I9100XXLS8 and I9100PBVLP7 as good modems.

If you look at your other question (How to manually replace ones RIL) you'll see it's pretty quick and easy to flip around between different RILs when you know what you're doing.  Give them a try and see how you go.