Mobile Network Connection

My Curve all the sudden will not let me stay connected to my Mobile Network for more than 45 seconds. I have gone thru and tried to manage my connections,but it will not allow me to save the settings. I took it to the store where I purchased it, and they atempted to do a wipe and start over, and the problem continued to happen.  Does any one have any clue as to how I can fix this?

Hi and Welcome to the Forums!
I suggest the following steps, in order, even if they seem redundant to what you have already tried (steps 1 and 2 each should result in a message coming to your BB...please wait for that before proceeding to the next step):
1) Register HRT
KB00510 How to register a BlackBerry smartphone with the wireless network
2) Delete and Resend Service Books
KB05000Delete the service book for the BlackBerry Internet Service email account from the BlackBerry smartphone
KB02830 Send the service books for the BlackBerry Internet Service
3) Batt Pull Reboot
Anytime random strange behavior or sluggishness creeps in, the first thing to do is a battery pop reboot. With power ON, remove the back cover and pull out the battery. Wait about a minute then replace the battery and cover. Power up and wait patiently through the long reboot -- ~5 minutes. See if things have returned to good operation. Like all computing devices, BB's suffer from memory leaks and such...with a hard reboot being the best cure.
Hopefully that will get things going again for you! If not, then you should continue working through your formal support channels -- as provided by your wireless service provider. They have the ability to escalate cases into RIM for enhances support at no fee to you...you have no free method to receive support from RIM. You should request escalation if they are not fixing it for you -- after all, you are paying them for a service that they are not delivering.
Good luck!
Occam's Razor nearly always applies when troubleshooting technology issues!
If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
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    Occam's Razor nearly always applies when troubleshooting technology issues!
    If anyone has been helpful to you, please show your appreciation by clicking the button inside of their post. Please click here and read, along with the threads to which it links, for helpful information to guide you as you proceed. I always recommend that you treat your BlackBerry like any other computing device, including using a regular backup schedule...click here for an article with instructions.
    Join our BBM Channels
    BSCF General Channel
    PIN: C0001B7B4   Display/Scan Bar Code
    Knowledge Base Updates
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    PIN: C0001B7B4   Display/Scan Bar Code
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    PIN: C0005A9AA   Display/Scan Bar Code

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