I updated my Galaxy S9 this past Friday after the last update disconnected my LTE service. I used the ##72786# method and updated my profile and service returned. Now, since yesterday (Sunday), I have not been able to connect to LTE. I have tried the same methods above and wiped my cache partition but I can't connect to LTE. This is so frustrating especially after getting it fixed only for it to turn off again 2 days later. Does anyone have any suggestions or know anything about the situation?
Just as an initial process of elimination can you try your sim card in another phone and another sim card in your phone.
Also does this happen everywhere ?
A Samsung Experience Store or Samsung Service Centre can help too via a diagnostic.
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Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
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My SIM card is fine. It happens everywhere and the LTE towers around are fine. They released an update that fixed this same issue for 2 days and now it's happening again. Many other S9 users on Boost/Sprint report the same issue.
did you try to force your network to LTE Only. Using SIM1 As mobile data connection. install this app for free https://play.google.com/store/apps/details?id=com.teknokia.force4glteonly
if you dislike ads you can install pro version here https://play.google.com/store/apps/details?id=com.teknokia.force4glteonlypro.