No Service on Galaxy SL GT I9003 I have a Samsung Galaxy SL running Android 2.3.6.

I bought a new battery and it was working perfectly until I put on recharge. Immidiately after I put it for recharge, it started showing "No Service". It does not receive any network coverage.

Everything else is working fine.
I can't comment due to limited experience.


Where is your question?
Try to insert the old battery and see if it improves the network coverage?
A Izzy stated, try to turn it off, remove the battery and turn it on again.
You can also try to turn on airplane mode for 1min, turn it off and check whether your network coverage gets back to normal. That's what I used when my 3G connection seems lost, it is faster than rebooting.
Try with another (a friend's) SIM card,
Change location where coverage might be better. The subway has no coverage, you know :-)