Hello Sharon Wertz
If your 3g cignal was stop working just clean the cache or data of the network or 3g cignal.
1. Go to Settings
2. Go to Applications
3. Select Manage Applications
4. Select ALL
5. find Network location or 3g cignal if it has
6. Select Click the Clear Data and Clear Cache that's it.
If the problem occurs try to reset your phone from factory reset
but before that move your apps to memory card then remove your SD card and Sim. You can reset that ways
For more ideas
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