IPHONE is the use of Unicom's WCDMA 3G standard signal, the use of mobile can only use GSM signal. So stick with the Unicom card.
Oh! Apple is what people show off! Personally, I don't think Apple is that good.
On the iPhone, open Settings - sound (or sound and touch) - phone ringtone or SMS ringtone ", in the list you can see the custom ringtone we have just imported, choose to change the ringtone can be, such asThis is shown below. The above is the iPhone custom ringtone and tutorial on the computer, the operation is very simple, basically download, and then import the iPhone ringtone library with one click.
Solution ** : Try to keep your phone away from potential sources of interference, or turn these devices off to see if this improves the signal. Sometimes, signal problems can be related to the SIM card. Check you outThe SIM card is damaged or needs to be replaced. An old SIM card can cause a spotty signal. Workaround ** : If you suspect a SIM card problem, contact your carrier to request a new SIM card.
iPhone XS Max signal is not good, you can try to open the phone Settings, in the 【 General 】-【 Restore 】, restore the phone's network Settings; Or turn on the phone [Settings], then turn on the airplane mode for 30 seconds, and then turn off the phone to search for signals again. If that doesn't work, try upgrading your phone's system to get the latest softwareVersion support.
Method 1: Restart/Flight mode Restart the iPhone can effectively clear the phone cache Flight mode allows the iPhone to search for and connect to the network signal again.
When a user has an unstable network signal, there are the following ways to troubleshoot the problem: First check the mobile phone terminal commitment manufacturer customer service consult whether the mobile phone supports the operator's fast network Check whether other operators around the user have the same situation, change the machine to change the card try to call the local operator customer service to consult whether there is a network problem.
Solution: iPhone EXs