hi. 
we develop mobile action game for UE4
we use replication networking and multiplay working on PC.
but android and iOS doesn’t work.
See android , iOS OSS(OnlineSubSystem) source code. still not support Mobile Multiplayer 
So. any have support Mobile Multiplayer plan? or Do I make myself?
I’m very interested in this as well. I’ve looked all over and haven’t found consistent answers. It seems like Game Center doesn’t support real-time multiplayer, but apparently Google Play can for both iOS and Android if implemented correctly. Let us know if you find anything.
P.S. in English, the correct form of the title would be either “The Die Is Cast” (singular) or “The Dice Are Cast” (plural).
I’ve been trying to get someone at Epic to respond to this for over a year now, no answers. I’ve posted on the forums under iOS and feedback to try and get it added as a feature request. I’ve posted on answer hub multiple times, I’ve even emailed the helpdesk who tell me they have passed my query on to the relevant team in all cases I’ve had no response. How Epic can ignore multiplayer support on mobile is beyond me, to the point where I thought it must have fallen through the cracks somewhere, hence my persistence. Unfortunately I’ve come to the conclusion that Epic just don’t care about multiplayer games on mobile. Apart from continuing to bug Epic ( please do ) , the only option appears to be you will have to have a go at implementing it yourself in C++. The API calls are there for the online subsystem in order to support the other GameCenter features like leaderboards, I guess you’d have to have a go at extending them and linking them back to a custom OSS class. Sadly that is all a bit beyond my coding skills at the moment.
You could run a PC as a game server and have your mobile users connect to that, but that would probably be a lot more work then implementing the GameCenter Multiplayer code.
Your game looks cool 
Sadly after getting multiplayer working fine on PC I’ve had to change the game to a single-player mini-game app for iOS due to the lack of multiplayer support
Best of luck
rOb
Thanks, rOb, I really appreciate the work you’ve put into this. Every time I see your name, I get a bit hopeful, thinking you may have had a breakthrough, so it makes me sad to read this. Hopefully at some point Epic will finally give you a legitimate reply. In the meantime, I will continue to investigate as well.
Thank you.