com.motorola.service.main repeatedly displays... Sorry. What is causing this gmail ??

[xcogman]

This happens all day long  plus no service or intermittent service (Data) all day long.

[Wildman]

That is a system file so I would say its probally a application you have installed because when you have a system app crashing it usually comes from something changing pr closing the application to access data and doesnt do it correctly..

Try booting into safe mode....  This will disable all 3rd party installed application and if the issue stops it is a application you installed causing the issue..

Enable Safe mode

1. Power the device off.
   Press and hold the Power button then select Power off.
   
2. Power the device on.
   Press and momentarily hold the Power button.
3. When the Motorola Dual Core screen appears, simultaneously press and hold Volume Up / Down keys.
   
4. Continue to hold the Volume Up / Down keys until Safe mode appears in the lower left.
   
5. While in Safe Mode, remove the most recently installed applications.
6. Power cycle the device then attempt to use the device.
7. If the device works properly, install applications one at a time to identify the application causing the problem.

 Disable Safe mode

1. Power the device off.
   Press and hold the Power button then select Power off.
2. Power the device on.
   Press the Power button.