Even if the T2C does not have a SIM card, the firmware upgrade can be done using an iPhone (internet connection required).
Method 1: iPhone connects to T2C WiFi
1. Power up the T2C
2.Wait for 40 seconds, the device will turn on the WIFI network（AutoKit_xxxx)
3.iPhone connect devices WIFI(AutoKit_xxx) Default Password (88888888)
The mobile phone accesses the Internet, the mobile phone pops up a reminder, choose to “use the cellular network”
4.Open the mobile browser and visit 192.168.3.1
5.Scroll down to the footer, if there is an update, it will appear here，and chick "Update
Method 2: iPhone connected to T2C Bluetooth
1.Power up the T2C
2.Turn on the Bluetooth of the iPhone to search and pair “AutoKit_xxxx”
3.After waiting for 40 seconds, the phone will pop up a reminder, select Use CarPlay
4.Open the mobile browser and visit 192.168.3.1
5.Scroll down to the footer, if there is an update, it will appear here，and chick "Update"
*When upgrading, the red LED blinks alternately
