thanks for the comments - I have been attempting a few things. Router is a constant, ultimately LAN is connected to it. Summarised results with Meraki Go, iPhone performance is inconsistent. Netgear and Aruba, no issues. Replicated baseline configuration across all platforms - for example, changing channel width, same physical location. All APs use DHCP client, ensuring routers is rebooted when changing vendor AP. Same issues with iPhones! The only consistent failure that i found, was Test to an Internet site from the AP, it failed. Test to meraki go passes!! Clients connected to the AP work fine apart from iPhone consistency! So from what I can see there is a DNS issue but its isolated to the Test Connection on the Meraki AP
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