Based on the discussion I would suspect it is faulty.   Some things you could try / confirm: When physically connected to the MX via the management - port 3 usually on the smaller MX devices - does your client receive a IP address? - try browsing to the default GW- try the following two links -  http://mx.meraki.com , http://wired.meraki.com  https://documentation.meraki.com/zGeneral_Administration/Tools_and_Troubleshooting/Using_the_Cisco_Meraki_Device_Local_Status_Page Then also try factory reset - https://documentation.meraki.com/zGeneral_Administration/Support/Resetting_Cisco_Meraki_Devices_to_Factory_Defaults   Hopefully the above helps - may suggest checking with Meraki Tac to see if they have anything else they could advise. You would likely have to get the RMA completed through them. In my experience RMA's have been very quick. ... View more

What happens when user's are prompted for re-login and alert / notification?   Do they need to re-authenticate and enter there authentication details again?   You can check the splash page frequency to confirm how often it should be appearing for users. Under configure and then splash page.   Please refer to this link - https://documentation.meraki.com/zGeneral_Administration/Cross-Platform_Content/Splash_Page_Frequency   Hopefully, that helps. ... View more

Experienced the same problem with the Splash Page showing only for Android devices but not for Apple Devices.   You can try the following: Checking the Firmware version running on the AP's to see if there is any known bugs - possibly try upgrading the access points. Check if there MDM software on the IPhones and not on the Androids. Are you able to run a packet capture when the device try to connect? Maybe check the wireless  health under the wireless - monitor tab to see the number of failed connections and the reason for them. - Might be difficult as the devices are not getting to the splash page to even authenticate. Review any firewall rules which could be preventing connectivity to cisco specific splash page. - If there was a rule blocking it I would expect it to impact both IPhone and Android. We never managed to get a resolution for our issue as we migrated to a PSK instead.   Hopefully the above helps. ... View more

Seen this in the event logs before:   Recommend this Meraki Troubleshooting link: https://documentation.meraki.com/MR/Monitoring_and_Reporting/DHCP_%22no_offers_received%22_Errors_in_the_Event_Log   Just check the following: Is the DHCP configured correct. Is there sufficient pool of IP addressing and do the clients have connectivity to the DHCP server. Hopefully that helps.     ... View more

I would recommend trying the following: Confirm no pin on the sim card or APN settings required part of the configuration. Some Carriers require a specific APN setting for Data Connectivity to work. This may require a second connection to configure the MX not sure if it can be configured via the management page. What firmware version is the MX using? - on 14.39 firmware there have been some bugs which have been resolved on later beta versions such as 15.19. These issues were specifically around cellular and connectivity. Confirm you have cellular coverage? - Does the SIM work in a different device just to rule out the sim card and network coverage. Finally, if you do decide to go ahead and factory reset the device which is an option you can use the following link from Meraki Documentation on how to complete this - https://documentation.meraki.com/zGeneral_Administration/Support/Resetting_Cisco_Meraki_Devices_to_Factory_Defaults   ... View more