You can try GT Recovery for Windows which can recover deleted messages without root your phone!
no root !
Can you retrieve deleted text messages on Android? Yeah, this video will show you the full guide for Android text message recovery. Don't hesitate and recover deleted textmessages from Android 4.0, 4.1, 4.2, 4.4, 5.0, 5.1 and more versions right now!
Not only can you recover SMS messages from Android backup but also can recover Android SMS messages without backup. This video is showing you how to recover deleted sms messages on Android without root your phone.
Some common situations that lost text messages you can recover from:
1. accidentally deleted texts on your android phone
2. lost text messages after Android 5.0 updated or other Android upgrade.
3. save textmessages from water damaged, crashed, broken or smashed Android phone
4. Android deleted text messages randomly by itself
5. Factory restore Android phone.
Do you want to unfreeze it? I suggest you can approach Onlinegsmunlock.com and specify the country,locked network of Samsung Star 3G GT-S5603.Based on the availability you can get the unfreeze code along with free instructions.
Did you mean network lock? or anything......However If you want network unlock code for your Samsung phone it's available at Wickedunlock.com
. Here you can need to specify your country, network provider and IMEI .
Then they deliver code to you.