If you are using Samsung Galaxy series or LG G3 with Android OS 5.0 and having a connection issue, please refer to the workaround stated as below.
Samsung Galaxy series
If your smartphone is Samsung Galaxy with Android 5.0, please disable "Smart network switch" in Wi-Fi setting.
Follow the instructions below. Do not use NFC One-touch connection in this case.
1.1. Tap Setting icon.
1.2. Tap [Wi-Fi].
1.3. Long Tap SSID of your camera. (f.e:Direct-*****)
1.4. Tap [Forget network].
2.1. Tap SSID of your camera.
2.2. Put password of your camera then tap [Connect].
2.3. Confirm [Connected] with your camera then tap Home button.
2.4. Tap PlayMemories Mobile icon.
2.5. Tap SSID of your camera.