Chosen Solution
antenna water damage keyone and then i shut down phone very fast after 4 hours turn on again but i seen decharge battery . after recharge my phone and then everything is fine but often 4G antenna lose or dosen’t work but working 2G mode very good anybody can help me about problem?
the only thing you can really do is take it to a repair shop or try repair it yourself by swapping out the antenna, but then again you DO have water damage so just know its a high chance your phone can become a money pit. somethings may work somethings may not.