31453328

some problems with 4G
« le: 18 décembre 2017 19:12:32 »
When I use 4G, sometimes some app can not connect with the network, when I change to 3G, everything is OK, when I change to Wifi, everything is OK, before all the app is OK and I have checked the set in mobile there is no problem, I think the problem is the new sim card , before I use other card everything is OK. I have gone to the free shop and the worker of free can not solve the problem, he gave me a telephone number to contact, but I can not call it. He told me I can change me sim card without pay for it again, Please contact me to solve the problem. How to solve it and change the card?