Search results: 4g sim

not turning on 4g on iphone is a situation where there is no 4g or lte icon on the iphone's wave column but only 3g or e, ... the following article will give you the most common

if you intend to use 4g network with fast speed of data download, you should not miss the opportunity when viettel operator is changing sim 4g for free.

this morning, after apple locked the ios 10.3.3 and 11 sign, many users confirmed that they could not activate their iphone lock with 4g sim card.