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you need alot more detail than just want you put. SInce this is not in the Jailbreak forum I'm going to assume you mean a vanilla iPhone. You can only use the apps on the phone if you login to the phone with the same Apple ID. The iCloud means that you can login to the store on the iPhone with the Apple ID go into iTunes and go to Purchased then click not on this phone. It will show you all the apps that are not installed on the phone and allow you to download and install. If you connect the phone to iTunes you can put them on it that way alot easier. If you're talking about two or more iPhones with different Apple ID then no.
Thank you so much.
I am thinking because it seems there's a problem with my Phone, it hangs a lot. So, can I connect my iPhone to a different account then copy all my apps there? Am I understanding it right? How? I am afraid I will lose my current apps and it's tedious for me to download them again if I buy a new iPhone, what do you think?