Two days later the team reported that the issue was found and a hotfix update was being pushed out to devices at that time.
OTDOA, as you likely aren't aware, is a system that uses LTE signals to determine a phone's location by pinging multiple cell towers and measuring how long it takes each signal to reach the tower. The company also stated in its statement how it managed to fix the issue with help from Qualcomm. The issue was troublesome at best, as it left the users vulnerable in emergency situations by not allowing them to call emergency service numbers. Overall, we were pretty impressed by how fast OnePlus reacted to it all.
Several OnePlus 5 users have recently been affected by a redundant reboot issue when calling 911 emergency number. The issue triggered due to the OTDOA protocol, which is a method that shares the location of the device with the emergency operators.
The source of this issue was related to a modem memory usage issue that triggered a reboot.
"To clarify, this occurred only on some OnePlus 5 devices, in random instances under the circumstances described above". It meant that the problem was associated with the software as well as how it communicated with the cellular modem of the OnePlus 5. The issue has been resolved through a software update that was released last Friday.
According to the statement, OnePlus has worked with Qualcomm to resolve this issue. For OnePlus 5 users who haven't received the update yet, they should simply wait for it to arrive since OnePlus is in the process of rolling out.
Users should receive a notification if the OxygenOS 4.5.6 update is available for their OnePlus 5 units. That's because the OnePlus 5 uses Qualcomm's Snapdragon 835 system-on-a-chip, which contains Qualcomm's own Snapdragon X16 LTE modem.
Speaking of which, not every OnePlus 5 was affected by this bug because not everyone makes calls over VoLTE and not every emergency number supports OTDOA.
The size of the new software patch is 32MB and comes with the description: Fixed reboot caused by dialling 911 on certain OnePlus 5 units.