Q: can not update apps on iphone 4s

Hello there, Fatima.

It sounds like you are having difficulty connecting to the iTunes Store to update applications. When troubleshooting iTunes Store connection issues, the following articles provide the best information:

First, try signing out of your account in Settings > iTunes & App Store. Once signed out, go ahead and sign back in.

Sign in with a different Apple ID on your iPhone, iPad, or iPod touch

If the above did not resolve your issue, refer to the following:

If you can’t connect to the iTunes Store

On your iPhone, iPad, or iPod touch

If you can't connect to the iTunes Store on your iPhone, iPad, or iPod touch:

1. Make sure that your date, time, and time zone are correct. Tap Settings > General > Date & Time. Time Zone might list another city in your time zone.
2. Make sure that your iOS software is up to date. Tap Settings > General > Software Update to check for updates. You can also connect your iOS device to iTunes and click Check for Update on your device's Summary page.
3. Check and verify that you're in range of a Wi-Fi router or base station. If you're using cellular service, make sure that cellular data is turned on from Settings > Cellular. If you're connected to cellular data, larger items might not download. You might need to connect to Wi-Fi to download apps, videos, and podcasts.
4. Make sure that you have an active Internet connection. Check your device's user guide for help with Internet connection.
5. Check to see if other devices, such as portable computers, are able to connect to the Wi-Fi network and access the Internet.
6. Reset your Wi-Fi router by turning it off and then on again.

If there's still an issue, learn what to do if your device won't connect to a Wi-Fi network.

Thanks for reaching out to Apple Support Communities.

Kind Regards.