# Why does the Java Library not support Digi XBee3 Cellular LTE-M?

**URL:** <https://forums.digi.com/t/why-does-the-java-library-not-support-digi-xbee3-cellular-lte-m/19877>\
**Category:** XBee - Cellular\
**Tags:** cellular, xbee-java-library\
**Created:** [September 17, 2018, 12:52pm UTC](https://forums.digi.com/t/why-does-the-java-library-not-support-digi-xbee3-cellular-lte-m/19877 "2018-09-17T12:52:50Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![SolveEtCoagula07](https://avatars.discourse-cdn.com/v4/letter/s/74df32/32.png) [@SolveEtCoagula07](https://forums.digi.com/u/SolveEtCoagula07)\
**Post date:** [September 17, 2018, 12:52pm UTC](https://forums.digi.com/t/why-does-the-java-library-not-support-digi-xbee3-cellular-lte-m/19877/1 "2018-09-17T12:52:50Z")

</div>

I recently purchased the Digi XBee3 Cellular LTE-M and installed the Java Library as the instructions stated. When attempting to use it to send an SMS I receive the following error:

WARNING: RXTX Version mismatch  
Jar version = RXTX-2.2pre1  
native lib Version = RXTX-2.2pre2  
Error  
com.digi.xbee.api.exceptions.XBeeException: Error reading device information: Your module seems to be Unknown and NOT Cellular. Check if you are using the appropriate device class.  
at com.digi.xbee.api.AbstractXBeeDevice.readDeviceInfo(AbstractXBeeDevice.java:551)  
at com.digi.xbee.api.IPDevice.readDeviceInfo(IPDevice.java:287)  
at com.digi.xbee.api.CellularDevice.readDeviceInfo(CellularDevice.java:291)  
at com.digi.xbee.api.XBeeDevice.open(XBeeDevice.java:368)  
at com.digi.xbee.api.CellularDevice.open(CellularDevice.java:271)  
at com.digi.xbee.example.MainApp.main(MainApp.java:40)

Does an update need to be made before the library can be used with the LTE M?