Which network is used when both Cellular Data and Wireless are on and connected?

[tetris24]

When both Cellular Data (3G in my case) and Wireless are enabled and connected with full bars and full wifi strength, which interface does the device use to send/receive data? Is there a way (App) to tell which is being used and/or does it depend on the type of data (streaming netflix vs sending an email for example)?

Thanks!


Edit:
The routing table shows 2 default routes which is what got me wondering in the first place:

Internet:
- destination: default
* gateway: 10.10.1.1
* netif: en0
* flags: UGSc
* refs: 320
* use: 0
* mtu: 1500
* expire: -1
- destination: default
* gateway: 75.209.69.73
* netif: pdp_ip0
* flags: UGScI
* refs: 25
* use: 0
* mtu: 1450
* expire: -1


First is my home network, second is my Cell Data.

 

[Zcott]

It always uses wifi when available.

 

[Gav2k]

I message uses cellular when avalible as does most push notifications. Other than that everything is via wifi

 

[tetris24]

Cool, thanks for the info.

 

[DollaTwentyFive]

Does it ever switch to 4G if it senses a faster connection?

I was watching a video and I had both 4G and WiFi enabled. I was in my own home, in range of my WiFi signal. I looked at the status bar and it said LTE instead of showing the WiFi logo.

I went into settings and shut the Cell Data off and I received a warning message something to the effect of degraded video quality.

I was always under the assumption that it would always be on WiFi unless WIFi was unavailable. This puzzled me and was a bit concerning, considering my 4G data is limited.

 

[TheWheelMan]

I can tell you that it always shows the cellular connection when it's on instead of the wifi signal (why it doesn't show both the way my phone does, I don't know). Which connection it defaults to using, I don't know.