My setup is: iPhone 5 (A1429) CDMA Sprint, R-SIM 8, Cutted SIM 128K, Oi Brazil Operator.
Here is a photo gallery of the following:
iOS7 CDMA Jailbreak and 3G/SMS Patch - a set on Flickr
site;
12) Run R-SIM_5.1.3.0.exe (iTunes is required);
13) Trust your computer on iPhone;
14) As you can see, the R-Patch does not know that the iPhone is jailbroken. That's right.
15) Click INSTALL;
16) Accept the installation of APN profile on iPhone;
17) That done, reboot;
18) Open RSIM3 on iPhone then touch Continue;
19) Turn OFF switch button;
20) In Settings >> Cellular, Enable Data Roaming;
Enjoy!
Bonus: To enable Personal Hotspot, install TetherMe from the R-SIM & iSAMSIM repository.
If you have any questions just talk.