''On Sunday 23rd April 2023, the UK Government will be testing the new Emergency Alert System at 3pm, which will send loud alerts to the vast majority of mobile phones & tablets throughout the UK."
To avoid unnecessary distress for whatever reason/an unexpected fright, some of our elderly relatives may need an advance reminder, or their mobile settings adjusted to opt out completely.
If they (or you, if doing so on their behalf) need a step-by-step, this is very clear:
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