The new Triggertrap Mobile Dongle fully supports volume-limited devices.You can identify it by its red cable.
The previous version of the Triggertrap Mobile Dongle (with a black cable) doesn’t work with iPhones, iPads or iPod Touches that have a volume limit set by Apple.
While this is apparently an EU rule, it doesn’t affect all EU devices. Bizarrely, it does also affect some non-EU devices.
Yes, it’s pretty confusing. To help clear things up, we’ve made a tool that should help you check if your iOS device is affected. For this we need your device’s part number, sometimes called the model code. Confusingly, this is not the same as the model code engraved on the back of the device. Here’s where to find it:
- Pick up your iPhone, iPad or iPod Touch
- Go to the Settings app
- Go to General
- Go to About
- Scroll down and read what it says next to “Model”
- Enter the code into the box below. It will be a six or seven digit code, beginning with MC or MD.
So how does this work?
It appears that Apple enforces the volume limit by comparing the region code for your device with a list that’s hard-coded into every iOS device (RegionalVolumeLimits.plist). The codes are: D, DK, DN, F, FB, FD, FP, HN, NF, PZ, S, TN, Z, ZB, ZD, ZG, ZI, ZK, ZO, ZR and ZV. These region codes are undocumented, but appear to be the letters at the end of the model number. We check your code against this list.
Additionally we check it against our own list to work out the country that it came from. While this isn’t 100% guaranteed, as Apple hasn’t told anyone exactly how the volume limits are enforced, or what the region codes mean, it seems to work for every device that we’ve checked.