Guide to Make iPhone 4 Faster, with Ultra Minimalistic 'Feature Phone like simplicity' Tweaks

Note: 

• This guide is tested on iPhone 4 only, not sure abut other iDevices. 
• This guide is long, but if you follow the steps carefully, you will understand what every tweak does.
• Please take your own risk before you start.

Prerequisite:

• Running iOS 7.1.2(iPhone 4 GSM)
• Jailbroken

Operations

Part 1: Setting up the phone

Do not login to your Apple ID or any online account.

1. Settings > General > Accessibility > Increase Contrast > Reduce Transparency -> Enable
2. Settings > General > Accesibility > Reduce Motion -> Enable
3. Settings > General > Spotlight Search -> Uncheck All Items
4. Settings > General > Background App Refresh -> Disable All
5. Settings > Privacy > Location Services -> Disable
6. Settings > Messages > iMessage -> Disable
7. Settings > Notification Centre -> Disable All (except Notification View)
8. Settings > Safari > Advance > JavaScript -> Disable (note: don't disable if your favorite websites use JavaScript, but would still highly recommend to disable it)

Part 2: Getting the Goodies from Cydia

Note: Please look around for your favorite repos, these all are common Cydia Tweaks.

• AdBlocker (block ads, reduce safari resource use)
• Auxo 2 (swipe up gesture home iPhone X-esque, my home button is busted)
• Chroma (To change that eye straining light blue highlight on every apps element, purely cosmetics)
• HideHomeTime (self explanatory, hide clock on home, creates cleaner look)
• HomescreenDesigner (Create homescreen layout, Springtomize complement app)
• iCleaner Pro (To disable useless daemon, hide cydia tweaks to prevent accidental changes to those and good all rounder to maintain performance)
• No Page Bounce (Disable rubber band effect on pages and home screen, reduce eyestrain and improve performance)
• NoKeyPop (Disable popping key on each keyboard keypress, reduce eyestrain, removing resource use on animation
• Springtomize 3 (Essential homescreen tweaks)

Part 3: Setting up Springtomize 3

Settings > Springtomize 3 >

1.Animations ->
1.1. Custom Speed -> Enable; Set to 0.3
1.2. Lock Animation -> None
1.3. Icons Scrolling Animation -> None

2. App Slider ->
2.1. Hide Icons -> Enable
2.2. Resize Page -> 170%

3. Control Center ->
3.1 Enable
3.2 Color -> Slider to Black; Intensity (1.00)
3.3 Hide Separators -> Enable

4. Dock ->
4.1. Hide Dock -> Enable
4.2. Hide Background -> Enable

5. Icons ->
5.1. Hide Updated -> Enable
5.2. Disable Wiggling -> Enable
5.2. Hide Badges -> Enable
5.3. Hide Badge Text -> Enable
5.4. Hide Icons->
5.4.1. Hide Newstand -> Enable
5.4.2. Hide Springtomize -> Enable
5.4.3. Hide Icons -> Hide all except: Calculator, Calendar, Camera, Clock, Messages, Music, Notes, Phone, Photos, Reminders, Safari, Settings (you can go back here to hide/unhide icons from homescreen like Cydia)
5.5. Lock Layout -> Enable (Enable this if you want to prevent apps from being moved)

6. Lock Screen ->
6.1. Slider Style -> Hidden

7. Notification Center ->
7.1. Background Color -> Enable; Slider to Black ; Intensity (1.00)
7.2. Hide Today -> Enable
7.3. Hide Missed -> Enable

8. Pages ->
8.1. Hide Dots -> Enable
8.2. Disable Spotlight -> Enable
8.3. Icons Settings -> Resize -> Enable; Resize Percentage -> 200%
8.4. Hide Labels -> Enable

9. Status Bar ->
9.1. Hide Items -> Airplane; Rotation Lock; Carrier


Part 4: Setting-up Homescreen Layout (Homescreen Designer)

1. Open the Application from homescreen
2. Grid -> Show Grid
3. Grid -> Change Grid Size; Columns (2), Rows (3)
4. Grid -> Fill Grid -> Delete Existing Icons
5. Hold Press Icon '3' -> Set Icon Position -> X:50, Y:211
6. Hold Press Icon '4' -> Set Icon Position -> X:210, Y:211
7. Hold Press Icon '5' -> Set Icon Position -> X:50, Y:367
8. Hold Press Icon '6' -> Set Icon Position -> X:210, Y:367
9. Save -> Save Portrait -> 2x3
10. Go to 'Saved' tab -> 2x3.plist -> Apply Layout -> 2x3.plist -> Save

Part 5: Misc Tweaks

1. Settings -> AdBlocker -> Enable All Toggles

2. Settings -> Auxo 2 ->
2.1. Multi Center -> Disable
2.2. Hot Corners -> Enable
2.3. Advanced Options -> Invert Hot Corners -> Enable (if you prefer home swipe on left corner instead of right)

3. Settings -> Chroma ->
3.1. Enabled
3.2. Dark Tint Color -> #404040
3.3. Light Tint Color -> #ffffff

4. Settings -> NoKeyPop -> Hide Popup -> Enable

Part 6: iCleaner Pro (Disable Daemons and Hide Tweaks from Settings)
1. '+' Sign tab ->

• 1.1. Preference Bundles -> (Uncheck to hide installed cydia tweaks preferences on settings, Recommendation: All except Springtomize)
• 1.2. Launch Daemon -> Disable All -> Reboot

Source: reddit