How can I distinguish between LTE and WiFi antennas?
Based on the wavelength-to-antenna ratio, it can be assumed that the largest antenna is for the 5 band (850 MHz), the left antenna is for wifi (2,400 MHz), right is for the 40 band (2300 MHz) and the lower is for band 3 (1800 MHz).
UPD: as written on the antenna, abbreviation RJ-PRA and RJ-DIV mean that the antenna is intended for mobile communication (main antennas). And with the reduction of RJ-WFA (maybe left right side antennas, you need to check) and RJ-WFB, it's a wifi antenna. (here is the info about antennas https://www.eximpulse.com/import-product-I-phone-6.htm?tpages=35585&amp;page=3596)