Device does not recover from signal loss

I have a BlackBerry Classic which does not reconnect to the mobile network properly after losing the signal. If I go into an area with no service for a period of time, the device will go into "Emergency Calls Only" mode. After going back into an area with service, it will not reconnect to the network. I have waited for 20 minutes for it to reconnect, and it does not. However, if I switch Airplane mode on and then off, the device will then immediately reconnect to the mobile network. Is this a known issue with the current BlackBerry OS software? My device is running OS version 10.3.1.747.

I no longer have a BlackBerry Classic. Today I returned it for a refund, and have switched back to using my Android device that I bought in 2010. I called the BlackBerry support line twice, and both times I hung up after waiting for 30 minutes with no response. I went through the steps to replicate the problem, and turned on log streaming so that I could try to diagnose the problem. After reviewing the log file, I found it was in a proprietary binary format that I was unable to read. In addition, both the diagnostic tools provided on the system, and the Virtual Expert tool recommended on this forum, do not have any abilities to diagnose cell network problems. Due to a lack of tools to troubleshoot this problem, and a lack of support from the vendor, I was unable to solve it, and therefore I had to consider the device non-viable for my purposes. I am a network administrator, and I rely on having a reliable phone that will make a best effort at all times to maintain a network connection since I have on-call responsibilities. I have to go into areas with low signal strength frequently for my job, so this problem was a huge issue for me.

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