How to avoid to have my carrier resend information to my G2X after losing sms over 4g after instaling a rom Ever since I got that great/not so great phone I have been attempting to get a good version of gingerbread running on it since the stock version of froyo LG has on it is too unstable for me. 

Every time I install a rom I it 90% functional but there is always something missing such as 4g, gps or network problems. 

I had finally found a rom I liked but I discovered I could not send sms/mms over 4g anymore. It would say cannot send message with a red exclamation mark in a triangle). It still worked over wifi. So I did like I always do and restored back to froyo. 

But this time the problem stuck!! I tried everything and finally had to call customer support. They resent some data to my phone and that fixed my problem. The tech support guy hinted strongly that my problem was because I installed a rom and said they could resend the data but nor "too often hint hint".

I installed at least 10 different roms before I had this problem. It appeared on rom: Hybrid - P999 Gingerbread 2.3.4 colorized from LG P990 UI - LG CAMERA - Rooted.

In the XDA thread there are a couple of guys who had the same complaint as me. The rom creator was quite upset we where accusing his rom but I had never heard of this problem in any other custom rom thread on XDA.

My question is! Can any rom do this and if so how can I avoid that? I am now afraid of installing roms and I like to do it so much!

My phone is a LG P999 branded as a Optimus 2X here in Canada. Carrier is videotron.
After installing new ROM did you setup the APN for your network? If the custom ROM doesn't have the settings for your network your MMS wont' work. For SMS it needs correct message center number which in most cases is automatically provided by network.