some times using my phone battery and single simble up and

It seems like your message might have a few typos or unclear phrases. If I understand correctly, you're experiencing issues with your iPhone 15, specifically related to the battery and the signal strength indicator going up and down. If that's the case, here are a few suggestions:

1. Battery Issues:
   1. Check your battery usage in the settings to identify any apps consuming excessive power.
   2. Ensure your software is up-to-date, as updates often include optimizations that can improve battery life.
   3. If the battery problem persists, consider contacting Apple Support for assistance or visiting an Apple Store.
2. Signal Strength Issues:
   1. Check if the signal issues occur in specific locations or are consistent throughout.
   2. Restart your iPhone or enable and disable Airplane mode to refresh the network connection.
   3. Ensure your SIM card is properly inserted and in good condition. If not, consider getting a replacement from your carrier.
   4. If the problem persists, contact your mobile carrier for assistance.
3. General Troubleshooting:
   1. Reset network settings on your iPhone to resolve any connectivity issues.
   2. If all else fails, you may consider performing a factory reset and restoring your iPhone from a backup.

If the issues persist, it's advisable to seek help from Apple Support or visit an authorized service center for a more in-depth examination of your device.

Can you please re-phrase your question?