Why are telecom mobile phones expensive?

Because the telecom mobile phone is expensive and the patent cost is high, the chips are all exclusive patents in Qualcomm, which is basically in a monopoly position. The CDMA2000 standard adopted by telecom belongs to Qualcomm's exclusive patent, and Qualcomm is overbearing in this respect, with many overlord clauses. The patent licensing fee is the most expensive, and the chip is the most expensive among the three 3G standards!