[Nexus 5X Q&A, Help & Troubleshooting] `leon:
I'm just a simple app dev with simple wishes..

So, as I went to Germany yesterday, I noticed that my phone wasn't connecting to the foreign network even though I turned roaming on beforehand, so I tried to manually pick one, nope: "Can't connect to this network at the moment. Try again later."

Didn't work for any of the networks, when I was back home from a day without navigation, i tried my local networks (It DID connect back to KPN, my service provider), but no luck either, the same Toast popped up saying it couldn't connect, when trying to manually connect to KPN, my service provider. Now, I'm getting back there tomorrow and headed to London in a couple of weeks, so I'm kind of in need of some internet ;P.

I'm thinking this is an issue with N, so confirmation would be nice. The Logcat isn't really being too helpful (Fetched through Android Studio):

06-27 17:00:59.935 6941-6941/? D/phone: [NetworksList] selected network: T-Mobile NL
06-27 17:00:59.986 3700-3973/? D/AudioFlinger: mixer(0xf1303540) throttle end: throttle time(4)
06-27 17:00:59.996 4693-4755/? I/WindowManager: Destroying surface Surface(name=com.android.phone/com.android.phone.NetworkSetting) called by com.android.server.wm.WindowStateAnimator.destroySurface:1931 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:875 com.android.server.wm.WindowState.destroyOrSaveSurface:2015 com.android.server.wm.AppWindowToken.destroySurfaces:345 com.android.server.wm.WindowStateAnimator.finishExit:547 com.android.server.wm.WindowStateAnimator.stepAnimationLocked:473 com.android.server.wm.WindowAnimator.updateWindowsLocked:303 com.android.server.wm.WindowAnimator.animateLocked:704
06-27 17:01:00.011 6941-6941/? D/phone: [NetworksList] hideProgressPanel
06-27 17:01:00.037 6941-6941/? D/phone: [NetworksList] manual network selection: failed!
06-27 17:01:00.037 4693-7509/? I/NotificationService: cancelToast pkg=com.android.phone callback=android.app.ITransientNotification$Stub$Proxy@71390b8
06-27 17:01:00.038 6513-6513/? V/DeadZone: consuming errant click: (106.0,18.0)
06-27 17:01:00.051 4693-13176/? W/InputMethodManagerService: Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@fbcde91 attribute=null, token = android.os.BinderProxy@8e79a75
06-27 17:01:00.054 31400-31400/? I/MemoryTrimmer: Trimming objects from memory, since app is in the background.
06-27 17:01:00.059 7609-7609/? I/MemoryTrimmer: Trimming objects from memory, since app is in the background.
06-27 17:01:00.157 6941-6941/? D/phone: [NetworksList] selected network: T-Mobile NL
06-27 17:01:00.229 4693-4755/? I/WindowManager: Destroying surface Surface(name=com.android.phone/com.android.phone.NetworkSetting) called by com.android.server.wm.WindowStateAnimator.destroySurface:1931 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:875 com.android.server.wm.WindowState.destroyOrSaveSurface:2015 com.android.server.wm.AppWindowToken.destroySurfaces:345 com.android.server.wm.WindowStateAnimator.finishExit:547 com.android.server.wm.WindowStateAnimator.stepAnimationLocked:473 com.android.server.wm.WindowAnimator.updateWindowsLocked:303 com.android.server.wm.WindowAnimator.animateLocked:704
06-27 17:01:00.239 6941-6941/? D/phone: [NetworksList] hideProgressPanel
06-27 17:01:00.254 6941-6941/? D/phone: [NetworksList] manual network selection: failed!
06-27 17:01:00.254 4693-11774/? I/NotificationService: cancelToast pkg=com.android.phone callback=android.app.ITransientNotification$Stub$Proxy@5718e85
06-27 17:01:00.274 4693-7499/? W/InputMethodManagerService: Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@aa464da attribute=null, token = android.os.BinderProxy@8e79a75
06-27 17:01:00.393 6941-6941/? D/phone: [NetworksList] selected network: T-Mobile NL
06-27 17:01:00.414 4693-4755/? I/WindowManager: Destroying surface Surface(name=Toast) called by com.android.server.wm.WindowStateAnimator.destroySurface:1931 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:875 com.android.server.wm.WindowState.destroyOrSaveSurface:2015 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementInner:429 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop:232 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement:180 com.android.server.wm.WindowManagerService$H.handleMessage:7978 android.os.Handler.dispatchMessage:102
06-27 17:01:00.450 4693-4755/? I/WindowManager: Destroying surface Surface(name=com.android.phone/com.android.phone.NetworkSetting) called by com.android.server.wm.WindowStateAnimator.destroySurface:1931 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:875 com.android.server.wm.WindowState.destroyOrSaveSurface:2015 com.android.server.wm.AppWindowToken.destroySurfaces:345 com.android.server.wm.WindowStateAnimator.finishExit:547 com.android.server.wm.WindowStateAnimator.stepAnimationLocked:473 com.android.server.wm.WindowAnimator.updateWindowsLocked:303 com.android.server.wm.WindowAnimator.animateLocked:704
06-27 17:01:00.470 6941-6941/? D/phone: [NetworksList] hideProgressPanel
06-27 17:01:00.500 6941-6941/? D/phone: [NetworksList] manual network selection: failed!
06-27 17:01:00.501 4693-6471/? I/NotificationService: cancelToast pkg=com.android.phone callback=android.app.ITransientNotification$Stub$Proxy@d7af27e
06-27 17:01:00.519 4693-11778/? W/InputMethodManagerService: Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@eafd3df attribute=null, token = android.os.BinderProxy@8e79a75
06-27 17:01:00.629 4693-4755/? I/WindowManager: Destroying surface Surface(name=Toast) called by com.android.server.wm.WindowStateAnimator.destroySurface:1931 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:875 com.android.server.wm.WindowState.destroyOrSaveSurface:2015 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementInner:429 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop:232 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement:180 com.android.server.wm.WindowManagerService$H.handleMessage:7978 android.os.Handler.dispatchMessage:102
06-27 17:01:00.694 4693-4755/? I/WindowManager: Destroying surface Surface(name=com.android.phone/com.android.phone.NetworkSetting) called by com.android.server.wm.WindowStateAnimator.destroySurface:1931 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:875 com.android.server.wm.WindowState.removeLocked:1414 com.android.server.wm.WindowManagerService.removeWindowInnerLocked:2433 com.android.server.wm.AppWindowToken.destroySurfaces:348 com.android.server.wm.WindowStateAnimator.finishExit:547 com.android.server.wm.WindowStateAnimator.stepAnimationLocked:473 com.android.server.wm.WindowAnimator.updateWindowsLocked:303
06-27 17:01:00.701 6941-6941/? D/phone: [NetworksList] selected network: T-Mobile NL
06-27 17:01:00.754 3700-3973/? D/AudioFlinger: mixer(0xf1303540) throttle end: throttle time(4)
06-27 17:01:00.775 6941-6941/? D/phone: [NetworksList] hideProgressPanel
06-27 17:01:00.782 4693-7509/? I/WindowManager: Destroying surface Surface(name=com.android.phone/com.android.phone.NetworkSetting) called by com.android.server.wm.WindowStateAnimator.destroySurface:1931 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:875 com.android.server.wm.WindowState.removeLocked:1414 com.android.server.wm.WindowManagerService.removeWindowInnerLocked:2433 com.android.server.wm.WindowManagerService.removeWindowLocked:2391 com.android.server.wm.WindowManagerService.removeWindowLocked:2269 com.android.server.wm.WindowManagerService.removeWindow:2264 com.android.server.wm.Session.remove:193
06-27 17:01:00.787 6941-6941/? D/phone: [NetworksList] manual network selection: failed!
06-27 17:01:00.787 4693-11773/? I/NotificationService: cancelToast pkg=com.android.phone callback=android.app.ITransientNotification$Stub$Proxy@e7b2273
06-27 17:01:00.811 7266-7641/? W/NotifCollectorService: SecurityException accessing existing notifications, scheduling retry
06-27 17:01:00.821 4693-7508/? W/InputMethodManagerService: Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@6dee530 attribute=null, token = android.os.BinderProxy@8e79a75
06-27 17:01:00.849 4693-4755/? I/WindowManager: Destroying surface Surface(name=Toast) called by com.android.server.wm.WindowStateAnimator.destroySurface:1931 com.android.server.wm.WindowStateAnimator.destroySurfaceLocked:875 com.android.server.wm.WindowState.destroyOrSaveSurface:2015 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementInner:429 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacementLoop:232 com.android.server.wm.WindowSurfacePlacer.performSurfacePlacement:180 com.android.server.wm.WindowManagerService$H.handleMessage:7978 android.os.Handler.dispatchMessage:102
06-27 17:01:00.858 6941-6941/? D/phone: [NetworksList] selected network: vodafone NL
06-27 17:01:00.898 3700-3973/? D/AudioFlinger: mixer(0xf1303540) throttle end: throttle time(4)
06-27 17:01:00.963 6941-6941/? D/phone: [NetworksList] hideProgressPanel
06-27 17:01:00.982 6941-6941/? D/phone: [NetworksList] manual network selection: failed!
06-27 17:01:00.983 4693-7513/? I/NotificationService: cancelToast pkg=com.android.phone callback=android.app.ITransientNotification$Stub$Proxy@ddfa2f4
06-27 17:01:01.016 4693-13179/? W/InputMethodManagerService: Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@896ea1d attribute=null, token = android.os.BinderProxy@8e79a75

Halp! Thanks in advance ;)