If I update my iPhone to ios8 will I lose my sms messages?

I have precious text messages from my late mother. I've never been quite good at storing and backing up data because Icloud once told me it was full (I have lots of photos!). Also my husband has his iTunes account on the pc as he has a load of music and don't want to mess that up.

No, updating the firmware doesn't delete anything from the phone

It shouldn't but that doesn't alter the fact that your precious messages are vulnerable to loss or corruption at any time.

Extra iCloud storage starts at just £2.99 a month. That's peanuts.

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