My OTA update is failing. The update installs to about 20% then I get the Andy on his back with a red exclamation triangle. The local store did a factory resets and no change. On the Motorola Mobility forum the admin says this indicates I moded my phone which I have not. How do I fix this? 
My phone:
- Model XT907 Razr M
- System Version 182.46.10.XT709.Verizon.en.US
- Android version 4.4.2
- Baseband version SM_BP_101031.042.32.86P
- Kernel version 3.4.42-g5170b6b
- Build number KDA20.62-10
- Build Date Thu May 1 19:34:18 PDT 2014