. . .Apple said that dual-band Wi-Fi routers that support both the 5GHz and 2.4GHz protocols were a particular problem. Apple recommends splitting dual-band routers in to two separate networks with different names but the same security settings. “Under certain conditions, iPad may not automatically rejoin a known Wi-Fi network after restart or waking from sleep,” said Apple in a statement. “This can occur with some third-party Wi-Fi routers that are dual-band capable when using the same network name for each network, or using different security settings for each network.” If these changes don’t improve the strength and quality of Wi-Fi connections, Apple has recommended that iPad users reset the network settings on their device.