Platform Features

Access Manager

• Are permissions stackable in PubNub Access Manager?
• Can a UUID serve as an auth key?
• Can I change a subscriber's auth key?
• Can I make bulk access permission changes?
• Does PubNub Access Manager apply to multiplexing?
• Does PubNub Access Manager apply to stored messages?

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Mobile Push

• Are push notifications always received by a mobile device?
• Are push notifications stored and retrieved via history API?
• Can I prevent my iOS end users having an invalid registration token (push message token)?
• Can I push to sandbox and production with the same key?
• Can I send large messages via APN?
• Can I send push notifications to an iOS simulator?

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Wildcard Subscribe

• How do I enable wildcard subscribe for my PubNub keys?
• How do I subscribe to a wildcard channel?
• How many channel segments are supported with wildcard subscribe?

Channel Groups

• Can I subscribe to a channel group with no channels?
• Channel Group Events Design Pattern
• How do I add a channel to a channel group?
• How do I remove a channel from a channel group?
• How do I subscribe to a channel group?
• How do I use namespaces with respect to channel groups?

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Multiplexing

• Can channels of different keys be multiplexed?
• Does channel multiplexing support multiple callbacks?
• How do I change a list of subscribed channels?
• How many channels does multiplexing support?

Storage

• Are stored messages affected by changing message size limits?
• Can I enable encryption for stored messages?
• Can I replay stored messages?
• Can I retrieve prior presence events?
• Can I store messages for select channels?
• Does multi-region configuration apply to stored messages?

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Presence

• Can I add data to presence UUID?
• Can I adjust the timeout period for presence?
• Can I retrieve historical presence data?
• Can I subscribe to presence messages only?
• Can I use the same UUID by multiple clients?
• Can PubNub call my server via Web Hooks when presence events occur?

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Functions

• How do I create a Function that keeps an accurate count using some increment functionality?
• How do I prevent a published message from actually being published?
• Why am I receiving "execution calls exceeds" error when I run my Function event handler?
• Why do my Functions pause or stop running?

Publish & Subscribe

• Can I use catchup to retrieve older messages?
• Do I need to create a PubNub object to send each message?
• Does PubNub guarantee message delivery?
• Does PubNub guarantee the order of messages?
• Does PubNub support HTTP Streaming & Pipelining?
• How to use PubNub's scalable MQTT Interface

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