Just bought one of these fine mobiles,However it performes as it should but i noticed it has developed a weird issue with the mic gain..If i turn it up past 46 the display won't go back to reading the frequency as it should it just showes nic55 all the way up..It will show when i key the mic then when i let up it goes back to showing the mic control level..But as stated if i drop the level to 46 or below it works as it should it will switch back to showing the frequency once you have it adjusted..I have tried a master reset and no help..Thanks for any input