> For the complete documentation index, see [llms.txt](https://docs.korewireless.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.korewireless.com/kore/errors/83702.md).
# 83702
Attachment Rejected Due To Network Not Allowed
## Description
The SIM could not to attach to the specified Network, either because its Fleet's Network Access Profile did not allow the Network or because KORE has blocked the IMSI currently being used from attaching to the Network.
## Possible Causes
* The Network Access Profile associated with this SIM's Fleet has blocked access to this Network.
* Twilio has disabled this Network for all SIMs.
## Possible Solutions
* Check the Network Access Profile associated with the SIM and enable the Network if you would like to use it.
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