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GPS location accuracy advisory

You may have recently been contacted by Bell MTS regarding potential impacts to location accuracy during 9-1-1 calls on your device.

This is due to the GPS Week Number Rollover (WNRO) event, which will occur as early as April 6th, 2019. This is a global GPS issue and not restricted to the wireless industry or 9-1-1. The Week Number Rollover refers to the limitation of values in the GPS message format counter. After the counter reaches the 1024th week, it will reset to zero, which is what will occur as early as April 6th. Properly configured devices should not be affected. However, some devices will incorrectly handle the April 6, 2019 rollover. Because GPS Time is used for user location determination, an improperly configured device may result in improper location information associated with 9-1-1 calls.

In addition to location accuracy during 9-1-1 calls, device applications that depend on GPS location may also be impacted.

Most devices are properly configured. However, the following devices are known to Bell MTS to be affected beginning April 6th. Certain devices have a software patch available to correct the issue. If no patch is available, you may contact us or visit a Bell MTS store to explore options. The following list provides known impacts and possible resolution for known affected devices if they were purchased from Bell MTS:

Device name Action
Alcatel 1

The latest software for this device will provide a fix for WNRO. Please ensure you are running the latest software. How to upgrade your software :

  1. Touch Apps.
  2. Touch Settings.
  3. Scroll to and touch System.
  4. Touch About phone.
  5. Touch Updates.
  6. The phone will check for updates.
  7. If an update isn't available, touch Home. If an update is available, wait for it to download and install
Alcatel A50

The latest software for this device will provide a fix for WNRO. Please ensure you are running the latest software. How to upgrade your software :

  1. Touch Apps.
  2. Scroll to and touch Settings.
  3. Scroll to and touch About phone.
  4. Touch Updates.
  5. The phone will check for updates.
  6. If an update isn't available, touch Home. If an update is available, wait for it to download and install
Alcatel ONETOUCH Pixi3 To explore your options please Contact Us or visit a Bell MTS store.
Alcatel ONETOUCH Idol X To explore your options please Contact Us or visit a Bell MTS store.
Alcatel ONETOUCH Idol Mini To explore your options please Contact Us or visit a Bell MTS store.
LG Optimus L5 II To explore your options please Contact Us or visit a Bell MTS store.
Sonim XP5560 Bolt 2 To explore your options please Contact Us or visit a Bell MTS store.
Sonim XP5560 Bolt 2 IS To explore your options please Contact Us or visit a Bell MTS store.
Sonim XP5520 Bolt To explore your options please Contact Us or visit a Bell MTS store.
Sony Xperia XA To explore your options please Contact Us or visit a Bell MTS store.

For any questions or concerns, please Contact Us or send a letter to:

P.O. Box 6666

333 Main Street

Winnipeg, MB R3C 3V6

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