At the moment, I have a Basic Salary with 3k a month, working as a Customer Service. A year ago I would think this was a pretty good deal, but I've been working with my Company for a little over a year now and talking to the new hires, they're getting paid 4k a month. If its a few hundreds I wouldn't really mind but a whooping 1k difference kind of leave a bad taste in my mouth, when we're essentially doing the same Job.

If possible, I don't really wanna jump over to a new company because of career growth in this company or at least, for my Resume before doing so. Im applying based off of SPM so I dont have the sijil's advantage like some other does ( I don't know how advantageous this is ). So the plan is to get some sort of Growth from an Agent, to maybe something like a Subject Matter Expert, QA, etc etc, before jumping to other company.

Question is, Is it possible to bring this up to my manager/boss ? My bargaining chip other than performances, would be to mention how new hires or others pay, is not the same as mine. Or is this considered to be a "rude" or "Ill-mannered" to bring up Salary discussions, based off of others salary ?

If anyone ever experienced bringing up Salary Discussion with their Higher ups can you guys let me know how I can tackle this as polite and as positive as possible ? Worst comes to worst I'll just find a new job instead lol