Android - Increase ROM Size

as i am facing problem here: Installing application on SD-card in Android sdk 2.2 , regarding application installation.

In above question, you can view the image in which "Internal Phone Storage" is showing where only 43.38 MB is showing , and in latest android phone, i know it is coming with higher space, i have seen 13.45 GB in Samsung Galaxy Android Phone.

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But Right now, i am using HTC Hero, so my questions are:

1. is there any way to increase ROM size without any side-effect?
2. How do i increase ROM Size?

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You don't.

ROM isn't application space, it is programmed at the factory and usually there is very little of it, just enough to boot up your device.

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is there any way to increase ROM size without any side-effect?

Not really. If you can deploy an alternative firmware (e.g., Cyanogen), you may wind up with more free space in the on-board flash.

How do i increase ROM Size?

Buy a new phone.

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I realize that this question is rather old, but many low-end devices suffer from the lack of RAM (e.g. my friend's Samsung Galaxy NEXT Turbo)

First: you need Root to use this. Nothing complicated, no custom rom, just root.

There is a very nice application which uses an SD card as Pseudo-ROM. It is called Link2SD https://play.google.com/store/apps/details?id=com.buak.Link2SD

You would need an application to partition the SD card with 2 partitions: FAT32 and EXT4 / EXT2

More details here: http://forum.xda-developers.com/showthread.php?t=1432459 and the free partition software from partitionwizard.com

Shrink the primary partition, make a new one in the empty space, set BOTH to active, and use Link2SD from your phone to manage your enormous new amount of RAM