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 Performance and Software Support in London and the South East UK
What this page covers
This guide explains the most common software‑related reasons why an iPhone becomes slow or unresponsive, the steps you can try yourself, and when it’s time to get professional on‑site help. It applies to:
• iPhone 17 / 17 Pro / 17 Pro Max / iPhone Air
• iPhone 16 / 16 Pro / 16 Pro Max
• iPhone 15 / 15 Pro
• iPhone 14 / 14 Pro
• iPhone 13 / 13 Pro
• iPhone 12 / 12 Pro
• iPhone SE (2nd and 3rd generation)
This page focuses on software issues only. Keith Thomas does not offer hardware repairs.
The most common performance problems
These are the issues Keith Thomas sees most often during on‑site visits:
• iPhone running slow
• iPhone slow after update
• iPhone slow after restore
• iPhone slow due to low storage
• iPhone slow due to System Data
• iPhone slow due to iCloud Photos
• iPhone slow due to Messages indexing
• iPhone slow due to background apps
• iPhone slow due to Apple Account issues
Quick checks you can do yourself
These steps solve around 40% of performance issues.
Check 1 – Restart the iPhone
Check 2 – Close all apps
Check 3 – Turn off Background App Refresh
Check 4 – Check iPhone storage
Check 5 – Update to the latest iOS version
iPhone running slow
This usually means:
• Background apps running continuously
• iCloud sync loop
• Mail fetch loop
Try:
• Turning off Background App Refresh
• Turning off Mail fetch temporarily
• Restarting the iPhone
iPhone slow after update
This usually means:
• iOS re‑indexing photos and messages
• Temporary iOS performance bug
• Background processes running
Try:
• Leaving the iPhone plugged in overnight
• Updating to the latest iOS version
• Restarting the iPhone
iPhone slow due to low storage
This usually means:
• Storage nearly full
• System Data too large
• iCloud Photos downloading originals
Try:
• Freeing storage space
• Turning on “Optimise iPhone Storage”
• Restarting the iPhone
iPhone slow due to iCloud Photos
This usually means:
• Photos uploading or downloading
• iCloud sync loop
• Large photo library indexing
Try:
• Checking iCloud Photos progress
• Turning on “Optimise iPhone Storage”
• Restarting the iPhone
iPhone slow due to Messages indexing
This usually means:
• Messages re‑indexing after update
• Large Messages history
• iCloud Messages syncing
Try:
• Leaving the iPhone plugged in overnight
• Checking Messages storage
• Restarting the iPhone
When DIY stops working
You should get on‑site help if:
• The iPhone remains slow all the time
• The iPhone is slow after update or restore
• The iPhone is slow due to iCloud or Mail
• Performance improves on another device but not your iPhone
These issues usually require:
• iPhone performance and software diagnostics
• iCloud Photos and Messages optimisation
• iOS update and background process optimisation
• iPhone configuration and repair
On‑Site iPhone Support – London & South East UK
If your iPhone is running slow, 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:
• iPhone performance and software issues
• iCloud Photos and Messages optimisation
• iOS update and background process diagnostics
• iPhone configuration and repair
Book on‑site help in London and the South East UK
If your iPhone is running slow, 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