Format iPhone, my USB thumb drive went from W/R speeds of about 250 to 10mb/s after a while, speed went normal after format. Can this be happening to old iphones? How to format them from the ground up?

I've read that because of the way they handle files, SSDs go slow over the time unless you apply protocols to handle the empty space. I noticed in a USB thumbdrive (Sandisk Extreme USB 3.0 64GB) that ovet the time and use it went from speeds around 250mb/s to about 10, I formated (full format, not a quick erase) it and it again performs properly. I have a old iPhone 4 that became very very slow over the time, more than what I would expect from it not keeping up with iOS 7. Could it be happening something like this? Maybe formating it from the ground up would speed it up a bit (ultimately is the same kind of memory holding the OS).
Is there a way to format it like that?
I would appreciate any insight on this.

Hi amilcarfrombarcelona,
It is possible to reset your iPhone back to its original settings using iTunes. See this article for the procedure -
Use iTunes to restore your iOS device to factory settings
http://support.apple.com/kb/HT1414
Please note that any data - including but not limited to documents, music, movies and TV shows that is stored on the iPhone will be gone after the restore. Any data that you do not want to lose MUST be backed up before the reset. See this article for methods -
iOS: Back up and restore your iOS device with iCloud or iTunes
http://support.apple.com/kb/HT1766
Thanks for using Apple Support Communities.
Best,
Brett L

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Message was edited by: Joshua Kapellen

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Format iPhone, my USB thumb drive went from W/R speeds of about 250 to 10mb/s after a while, speed went normal after format. Can this be happening to old iphones? How to format them from the ground up?

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