Can't add songs to iPhone 4s?

I tried using the latest version of iTunes and Copytrans but I still can't transfer songs to my iPhone using the method I usually use which is manually drag and drop files. When I drag songs to iTunes, it's just greyed out and can't be edited (details inside Get Info greyed out too) and doesn't show up on the phone as well. On CopyTrans, it says an error when updating/saving changes.

I deleted a song and added it back but it's greyed out so it can't be the file type. I have plenty of disk space too. Just half of the 64gb used.

I'm afraid it might be the phone itself that has the problem. I didn't have the problem right after I upgraded to iOS7. I transferred some songs successfully after the update. This just happened all of a sudden. I don't want to delete all my songs and re-sync as there's about 25gb songs and it's hard to put them all back in as most of these are ripped from CDs.

Any suggestions for troubleshoots?

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I searched everywhere but they all seemed to only transfer songs purchased or downloaded in itunes and i have absolutely no songs downloaded from itunes but i need to transfer all of the music in my phone to my new laptop, is there a possible way to do that? I tried puttting the songs in a flash drive but it only 13% of my songs went into itunes and i tried several times, please please please help!

CDMA iphone 4 straight talk internet is working?

CDMA iphone 4 straight talk internet is working? I bought an iPhone 4 from Wal Mart about a week and a half ago and today the internet stopped working. Safari pages won't load, Instagram won't load, or apps won't download. And I can't get a SIM card because CDMA iphones don't have a SIM slot for it. How can I fix? I tried EVERYTHING! Wi-Fi off, airplane mode off, resetting, and turning phone off.

CDMA iphone 4 straight talk internet is working? - 1

I bought an iPhone 4 from Wal Mart about a week and a half ago and today the internet stopped working. Safari pages won't load, Instagram won't load, or apps won't download. And I can't get a SIM card because CDMA iphones don't have a SIM slot for it. How can I fix? I tried EVERYTHING! Wi-Fi off, airplane mode off, resetting, and turning phone off.