The new Apple update, released last week, causes users not to be able to connect to mobile networks.
Marius Nestor, from Softpedia reported that he suffered from this problem, adding that the usual solution to enable and disable Airplane Mode did not work.
Many iPhone users report this same issue, which Nestor said was solved only after resetting his phone twice.
Nestor's second reset of his iPhone took hours after the first, but the resolution of the problem may have been caused by something else.
To avoid this problem, Nestor recommends that iPhone users avoid the update to version 12.1.3 of iOS until the problem is resolved.
Now read: Apple partners move China's manufacturing as tensions increase