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iPhone Not Backing up to iCloud – How to Fix It 2026 Guide

Why Choose Keith Thomas

20 years of experience as a Senior Apple Support Specialist at Apple Computer UK HQ.

• Former Apple Computer UK Mac Support Specialist and Apple Authorised Service Provider background.

Established and Independent since 2010 for on‑site Apple Support Service – no call centres, no outsourcing, no hardware repairs. Over 25,000+ Apple problems resolved. Unique on-site Apple Support Service. backed up with Independent Apple Telephone Support Assistance.

• Trusted by home users, small businesses, and professionals across London and the South East UK.• Clear, honest, software‑only support. No Hardware Repairs. Expert Apple Consultancy Service.

On‑site iPhone Support in London and the South East UK

What this page covers

This guide explains the most common reasons why an iPhone will not back up to iCloud, the steps you can try yourself, and when it’s time to get professional on‑site help. It applies to:

• iPhone 15 / 15 Pro

• iPhone 14 / 14 Pro

• iPhone 13 / 13 Pro

• iPhone 12 / 12 Pro

• iPhone 11 / 11 Pro

• iPhone SE (all models)

If your iPhone will not back up to iCloud, keeps showing errors, or gets stuck preparing a backup, this page is for you.

The most common iPhone backup problems

These are the issues that Keith Thomas identifies most often during on‑site visits:

• iPhone not backing up to iCloud

• iPhone stuck on “Preparing Backup”

• iPhone stuck on “Estimating Time Remaining”

• iPhone backup taking hours

• iCloud storage full

• iPhone backup failing with an error

• iPhone not backing up over Wi‑Fi

• iPhone not backing up overnight

• iPhone not backing up after update

Quick checks you can do yourself

These steps solve around 60% of iPhone backup issues.

Check 1 – Make sure the iPhone is connected to Wi‑Fi

iCloud backups do not work over mobile data.

Check 2 – Plug the iPhone into power

iCloud backups only run automatically when the iPhone is charging.

Check 3 – Check iCloud storage

Go to Settings → Your Name → iCloud → Manage Account Storage.

Check 4 – Restart the iPhone

This clears temporary backup and iCloud errors.

iPhone not backing up to iCloud

This usually means:

• iCloud storage is full

• Wi‑Fi connection issues

• iCloud backup disabled

Try:

• Checking iCloud storage

• Restarting the iPhone

• Turning iCloud Backup off and on

iPhone stuck on “Preparing Backup”

This usually means:

• Large photo library

• Slow Wi‑Fi

• iCloud server delay

Try:

• Leaving the iPhone plugged in for 1–2 hours

• Restarting Wi‑Fi router

• Restarting the iPhone

iPhone stuck on “Estimating Time Remaining”

This usually means:

• Slow upload speed

• Large app data

• iCloud congestion

Try:

• Restarting the router

• Leaving the iPhone plugged in overnight

• Removing large unused apps

iPhone backup taking hours

This usually means:

• Slow broadband upload speed

• Large photo library

• Large WhatsApp or Messages data

Try:

• Restarting the router

• Backing up overnight

• Deleting old WhatsApp backups

iCloud storage full

This usually means:

• Old device backups

• Large photo library

• iCloud Drive files taking space

Try:

• Deleting old backups

• Turning on iCloud Photos

• Upgrading iCloud storage

iPhone backup failing with an error

This usually means:

• iCloud server issues

• Network timeout

• Corrupted previous backup

Try:

• Deleting the old backup

• Restarting the iPhone

• Restarting the router

iPhone not backing up over Wi‑Fi

This usually means:

• Weak Wi‑Fi signal

• Router compatibility issues

• Guest network enabled

Try:

• Moving closer to the router

• Restarting the router

• Turning off guest Wi‑Fi

iPhone not backing up overnight

This usually means:

• iPhone not plugged in

• Wi‑Fi disconnected overnight

• Low Power Mode enabled

Try:

• Plugging the iPhone in before bed

• Turning off Low Power Mode

• Restarting the router

iPhone not backing up after update

This usually means:

• iCloud settings reset

• Backup toggle turned off

• Temporary iOS bug

Try:

• Turning iCloud Backup off and on

• Restarting the iPhone

• Signing out and back into iCloud

When DIY stops working

You should get on‑site help if:

• The iPhone will not back up at all

• iCloud storage is full and you cannot free space

• Backup errors keep appearing

• Backup is stuck for hours

These issues usually require:

• iCloud account repair

• iPhone configuration repair

• iCloud storage optimisation

• Wi‑Fi and router diagnostics

On‑Site iPhone Support – London & South East UK

If your iPhone will not back up to iCloud, Keith Thomas provides an often same‑day on‑site support service across:

• Central London

• West, North, South and East London

• Surrey

• Berkshire

• Hampshire

• Wiltshire

Keith Thomas is an Apple Support Specialist in:

• iCloud backup issues

• Apple ID and iCloud account problems

• iPhone and Mac syncing issues

• Wi‑Fi and network problems

• iCloud storage optimisation

Book on‑site help in London and the South East UK

If your iPhone will not back up to iCloud, Keith Thomas can visit your home or office and get everything working again.

Keith Thomas – Apple Support Specialist

Established 2010 – Open 09:30–20:30, 7 Days

Contact Keith Thomas by Telephone: 07800 940756 or by Text to: 07800 940756, or simply complete an online website contact form 24/7