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Sure it will. It's about the storage location of the string, not about what you do with it.
If you use the F() function around a string then it will get placed into program memory and replaced by a pointer to that location which is then used to process your text as usual. This will free your memory for variables (SRAM) which is way smaller then program memory.So Serial.print("your text"); needs to change to Serial.print(F("your text"));This trick helped me to avoid upgrading.
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