Question: what is the difference between a 3g and 4g sim card?
Answer: The main difference is that if you are logged in a 4G network you have higher throughput rate than 3G services. ... 3G and 4G both networks, connects your phone to the internet. The difference is in their network and internet speed. You can use 3G sim card in 4G phone but you can't use 4G sim card in 3G phone.