... and I also stored it in my device. I did that because I knew the device am using could just fail unexpectedly due to over heating and even if i misplaced one, i cannot misplace others. ...
I consider this a mistake when you store your mnemonic recovery words on a device that is used regularly and which very likely is an online device. This leaves the recovery words exposed on a device that can be infected by malware and where you therefore can loose control over your backup. DO NOT store your recovery words and maybe an additional mnemonic passphrase on online devices.
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This thread isn't about individual private keys and possibly missing some characters from them. It's about issues with the backup of a deterministic wallet where the recovery words and possibly a few other details (like address type, derivation path, etc.) are normally sufficient to recreate all private keys of a wallet.
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If someone isn't able to write down 12 or 24 words error-free in the correct and reproducible order, then I'd argue this person shouldn't touch crypto coins at all. It isn't rocket science exactly when you're aware of the importance of such a backup and handle it accordingly.
You can avoid such issues as brought up here, when you properly verify that your can recover the exact same wallet that you initially created solely from your backup. If you skip this verification step, you're using your wallet on hope alone.
... and now I am much better when I take a photo with my phone and save with the two options of writing and taking a photo it is much safer than just using the option of saving it by rewriting or copying it.
JayJuanGee already addressed this and I want to add my few bits. You gave up sovereign control of your recovery words backup to some picture cloud. Remember that a "cloud" is just someone else's computer(s), well definitely not yours anymore?
Have you ever read the terms of such picture clouds and remembered what's in those terms? You hope the cloud owner will never feed your pictures to some AI training or never loose pictures to hackers or someone else browsing your pictures when you let them do it? Some picture clouds or gallery apps offer "comfort" functions like automatic classification of picture content. You hope this is done locally only on your device?
This is basically the same (or rather worse) as storing your mnemonic recovery backup on a regularly used online device.
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Seriously? Your pants pocket isn't exactly the safest place to store your mnemonic recovery words backup. I'm aware that your case likely wasn't intentional, but it shows quite some negligence to proper handle, transport and safely store your backup.
I'm just highlighting that you were quite careless with your written backup and I hope for you it wasn't your common way of handling such sensitive data.
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You could add a simple verification step that your backup is sufficient to recover the same wallet that you created initially. Solves basically most later recovery issues or backup errors.
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If you need or want a (house-)fire-proof backup, then stamping your recovery words into appropriately fire-resistant metal isn't a bad idea. On the other hand it's not really mandatory if you have redundant copies of your paper backup at different locations, then it's not likely to loose all of them in some fire or water hazard situation.
Of course, it depends on how sure you can be about the safety of your backup storage at those different locations (e.g. could just be one at your work place and/or at one of your relatives or persons you can trust to store a sealed envelope or small box).