Social media app not working on my iPhone with mobile data

The number of bars you see for mobile signal strength doesn't tell you anything about your remaining data plan balance. Here's a more detailed explanation:

• Signal Bars: These bars represent the strength of the cellular signal you're receiving from your carrier's towers. More bars generally mean a stronger connection, leading to better call quality, faster data speeds, and more reliable service.
• Data Plan Balance: This refers to the amount of data you have remaining in your mobile data plan. It's independent of signal strength. You can usually check your data balance through your carrier's app, website, or by dialing a specific code on your phone (varies by carrier).

FUP (Fair Usage Policy) Limits:

You mentioned FUP, which stands for Fair Usage Policy. Many carriers implement FUPs to manage network congestion and ensure everyone gets a fair share of the bandwidth. An FUP might limit the total amount of data you can use in a billing cycle after a certain threshold.

Here's how this plays out:

• Even with full signal bars, if you've reached your FUP limit, your data speeds might slow down significantly. This is a way for carriers to prioritize bandwidth for users who haven't used up their data allowance yet.

In short:

• Signal bars indicate connection strength, not data balance.
• Check your data balance through your carrier's app, website, or a specific code.
• FUP limits might slow down your data speeds after reaching a certain usage threshold, regardless of signal strength.