Question: can we use 2 jio sims in one phone?
Answer: Both sims being 4G at the same time is equal to using to 2 internet connections at same time which is not available in phones. ... This is the reason why you have to keep one sim in 2G/3G mode while other is on 4G. Since Jio has only 4G network and no 2G/3G fallback for calls only, you cannot use 2 Jio sims in 1 phone.