Samsung Galaxy A20 sóng 2G nghe gọi ok, sóng 4G có sóng nhưng không gọi được, đo mất áp&nbsp;mất áp VCC1 cấp cho khối PA 3,4G.<div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgbXLu7q8LWfy_OZpn_DUDTyvFE3cOJycHo3QG1kUiNiX-fzOAXG4PSpug_gQFRcCGB_1mWGohDIMN09ZmuD26BimlUfTLyoq9EeB2VKcjw3AENgGCcwARZbaJrYsD2hEFPLBocKEzUHc1d/s764/samsung-galaxy-a20-mat-song-4g.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="534" data-original-width="764" height="448" loading="lazy" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgbXLu7q8LWfy_OZpn_DUDTyvFE3cOJycHo3QG1kUiNiX-fzOAXG4PSpug_gQFRcCGB_1mWGohDIMN09ZmuD26BimlUfTLyoq9EeB2VKcjw3AENgGCcwARZbaJrYsD2hEFPLBocKEzUHc1d/w640-h448-rw/samsung-galaxy-a20-mat-song-4g.jpg" title="Samsung Galaxy A20 mất sóng 4G" width="640" /></a></div><br /><div><br /></div>