I was told recruiters will lie to you and you will end up with a different job after basic. Is this true?

The best advice I can give you is "get it in writing". I think most recruiters are truthful but the facts are that it's a 'dog eat dog' business. A recruiter can beat his/her quota one month and get a medal, then fall below next month and get a bad eval. If you get all the promises (schools, duty stations, jobs etc.) in writing, the service has to honor that. Word of warning....read the contract carefully and get a written explanation for anything you don't understand. If you screw up and violate the contract, all bets are off. An example would be having a guarantee for three schools that build on each other and flunking out of the second school. Sorry, Charlie....you are probably now subject to the needs of the service.

Grant Varnum Scored High Enough for Nuke that puts you in the Top 5% of the Navy. You May Catch some Flack about being a Geek a Nerd but you can laugh all the way to the bank if you finish the program. Congratulations and Welcome Aboard.

Key to any military enlistment is not to get in a hurry. The wrong occupational choice can really hurt you in the long run. Jobs at M.E.P.S are offered through guidance counselor based on military needs per job. If the job you want is not available now and you qualify , just wait and go back later when it does. Sometimes waiting will also result in a better bonus. Recruiters are pressured and evaluated and promoted based on performance i.e. putting guys in boots to them your a number SO TAKE CARE OF YOU DO NOT RUSH IT RESEARCH IT, BE PATIENT, BE FOCUSED

Its not a matter of lying. Its a matter of the needs of the service. Furthermore, along the way it may become apparent that the MOS you signed up for is not a good match.

I had an aviation guarantee in the Marines. I found out in TBS that I loved the infantry, plus at that time I found out pilots were full-time something else (more time on collateral duties than on primary MOS) and only flew about 12 hours a month. In the FMF I was working on infantry skills 32-40 hours a week, at a minimum. I dropped aviation like a hot potato and never looked back.

The most common reasons people do not end up in the MOS they signed up for is they did not meet some standard. That could be anything from being recycled in boot camp to failing to swim qualify (you might need to swim in the Navy). If they put you in a the nuclear program it is normally a pretty specific MOS and you may have to sign a longer contract due to the length of the schools you will need to attend. Keep your nose clean, do well in your quals and your school.

The Army has you choose before you ever leave for basic, and it won't change unless you flunk out of the training for it.

You get what you sign up for on your contract, unless you fail in Basic/Ait and then you are either out or assigned to the needs of the Army.

As a former AF recruiting squadron commander, I can tell you that as long as you remain qualified for the job agreed to on your contract, you will get that job when you graduate tech school. That means physically, emotionally and intellectually qualified. Don't get injured in a way that disqualifies you, if you need a special clearance and you seem emotionally immature or unsteady, they might refuse to grant you the clearance level needed and of course you have to pass all portions of the tech school. Talk to other people, other recruiters and other services about what is on offer and what they did or didn't like about the service, their jobs and their lives.
My career field of transportation and logistics was not what I chose, they offered it to me as an alternative to the ones I wanted but they weren't available. I was very happy with the career field I ended up with. I loved what I did, even my special duty in recruiting.

Do recruiters lie? Yes. I told my recruiter I had a criminal record when I joined. He said he ran a back ground check and nothing popped up. So he put in my packet "no record." When I was in OSUT guess what they do? Run back ground checks for security clearances, and guess what popped up? Pvt Castaneda has been changed with a felony. To make a long story short, I ended up staying there for 10 months until I was finally allowed to leave. I was only supposed to be there for 14 weeks total. My recruiter lied to me. I was young and didn't know any better. Thought maybe because I wasn't convicted there was no record of the arrest. 10 months around drill sergeants taught me some valuable lessons.

No offense to my fellow Navy recruiters here, but when I was recruiting the navy was pushing the Nuke program hard to anyone qualified. Unless you are interested in the program, look at all your options. You don't need to limit yourself to the more educational demanding MOS's. Not saying you need to, but I put in several guys who scored really high in the grunts because that was what they wanted.
As for lying... some will flat out lie
Most just wont tell you everything. Manly because you only get 45 min or so with them.
Just don't let them push you into a direction you don't want. That is why I didn't join the first branch I looked into.