There are a number of posts on the Internet referencing a similar problem with the T-Mobile network and the Wi-Fi calling feature. T-Mobile users are able to force their phones out of airplane mode by re-pointing the phone network preferences via the Wi-Fi calling menu.. Unfortunately, Verizon doesn't offer Wi-Fi calling, so that fix wasn't even an option for me. I bit the bullet and did a hard reset of the phone, but when I got to the activation screen, the phone wouldn't connect to the Verizon network and the activation failed.
The folks at Verizon tech support are unaware of any issues related to what happened to me, but, I think my experience coupled with the T-Mobile issues are indicative of a greater problem. It seems to me that there's a bug with the antenna software in Android 4.3. Thankfully, my Samsung Galaxy S4 is still under warranty, so I'll have a replacement in a few days and I won't have to bother with the issue any further. However, if that weren't the case, I still have a few things that I would try in order to get the phone working properly:
- Replace the SIM card (I'm almost positive that the issue resides here)
- Root the phone
- Upgrade to Android 4.4
So, if your phone is stuck in airplane mode and you're not a T-Mobile customer and you can't get a warranty replacement, try one of the above three options. And let me know if it works.