My phone is no space in storage If update is possible?

Disk space - How to check the storage on your iPhone, iPad, and iPod touch.    

 Disk Space – Free Up    

 Disk Space – Free Up (2).  

 Disk Space – Free Up (3).   

 Disk Space - Free Up (4)        

 Disk Space - Free Up (5)         

You can't increase your storage on an iPhone. But, here is some information that should help you manage your storage.

On you iPhone:

How to check the storage on your iPhone, iPad, and iPod touch  https://support.apple.com/en-us/HT201656

How to free up space on an iPhone https://www.macworld.co.uk/how-to/iphone/free-space-iphone-3524712/

10 Easy Ways To Free Up A Lot Of Space On Your iPhone https://www.huffpost.com/entry/iphone-free-space-tips_n_6269756

iPhone Other storage: What is it and how do you delete it?

https://www.macworld.com/article/3388219/iphone-other-storage-what-is-it-and-how-do-you-delete-it.html 

Note that I would never optimize storage on an iDevice or a Mac. Others may argue for using this procedure.

 On iCloud:

Check your iCloud storage usage on iCloud.com https://support.apple.com/guide/icloud/check-your-storage-usage-mm6e5a441fc7/1.0/icloud/1.0

Manage your iCloud storage https://support.apple.com/en-us/HT204247

If you need more space for an update - Apple Support

nareshrules wrote:

My iPhone storage is full is update possible?

No, you need to have 3-5 GB free to update iOS