4g mobile phones are usually manufactured at more than 7 nanometers.
Widely considered to be the world's first 5G phone, Samsung launched it in late March and early April 2019. Samsung Galaxy S10 5G This model is equipped with Qualcomm Snapdragon 7 nanometer process 855 chip, X50 external 5G baseband. Generally speaking, the flagship machine after 5g, roughly such a limit. Of course, there are exceptions, such as Huawei's new 5nm phone also has a 4g version. In general, 4g mobile phones have more 14, 12, 10 and 7 nanometer chips.
The number of nanometer chips used in 4g mobile phones depends on the configuration of your mobile phone. If it is a high-end mobile phone, like Huawei's most high-end mobile phone, the Kirin 9000 configuration can be a 5 nanometer chip.
But there are also low-end mobile phones, low-end mobile phones are generally used, 14 nm, 10 nm chips have.
Basically, the chips used by different phones in different prices are also different, and the more expensive mobile phones use chip manufacturing processes, the more advanced they are!
4g mobile phones use many nano chips, like Huawei p50 series, using 5nm chip, support 4g network, and some low-end models also support 4g network, but the chip may be 14nm or 16nm.