Whether buying a new phone or repairing an existing one is more affordable depends on the specific issues and the phone’s condition/value. Some factors to consider:

• For minor issues like cracked screens, battery replacements, or port/button repairs, fixing the phone is often much cheaper than a new one. 
• For major problems like extensive water damage or failed logic boards, repairs may exceed half the phone’s worth, in which case it’s more cost-effective to upgrade.
• The phone’s age and any warranties/insurance coverage also influence the repair vs replacement decision. Newer phones are worth repairing, older phones may be at the end of their life cycle.
• Refurbished or used phones can provide new phone capabilities at a fraction of the cost, falling between repairs and full retail pricing for brand-new devices.

On balance, minor repairs are the frugal choice for phones less than 2 years old. Severe issues or older phones may warrant upgrading instead of sinking funds into unfeasible fixes. Consider all options to determine the most affordable path forward.

Whether fixing a smartphone is worth the trouble depends on several factors:

• Cost of repairs vs. replacement – As mentioned earlier, repairs for minor issues are often cheaper than buying a new phone. Major problems may exceed the phone’s value.
• Warranty status – Phones still under the manufacturer’s warranty can usually be repaired for free or low cost at authorized centres. Out-of-warranty repairs will be paid by the customer.
• Attachment to the phone – Some people are more attached to their existing device based on sentimental reasons, data/photos not backed up elsewhere, or simply preferring familiar features over changing phones.
• Condition otherwise – If the phone still works well aside from one problem like a cracked screen, the repair makes sense. However multiple ongoing issues may be a sign the phone is near the end of its lifespan.
• How long repairs typically last – Some fixes like cracked screens can reoccur, while others provide a more permanent solution. The reliability of the repair is a factor.

Yes, it is generally possible to fix a cracked or damaged smartphone screen through repair or replacement.

If the screen on your phone is cracked, you may still be able to use it, but the functionality could be impacted depending on the severity of the damage. Minor cracks may have little effect, while larger or centralized cracks could cause touchscreen responsiveness issues. A heavily shattered screen would likely make the phone very difficult to rely on.

While fixing your phone is possible, we recommend professional repairs for most users. Phone components can be delicate and require specialised tools/skills. Some DIY options include:

• Screen replacements have kits but require heat guns/adhesives that may damage the device if not done perfectly.
• Battery swaps are simpler but must ensure waterproofing isn’t compromised.
• Speaker/mic repairs have soldering involved.
• Complex issues like water damage or logic board failures are best left to experts.

There’s no set rule, but most people replace their phone every 2-4 years as a general guideline. After this time, batteries tend to degrade and repairs can become too costly compared to a new device. However, if a phone still serves your needs, there’s no need to upgrade solely based on its age. The right time depends on individual usage patterns and how the device is holding up.