The subject line says "no internet" but your post says "internet is very weak".
Which is it?
What exactly do you mean by "very weak"?
What are the exact symptoms of the problem?
When was it working ok for you last?
What changed in the meantime?
Are your APN settings configured correctly?
Are calls and texts working ok?
If you need to contact 48 support about this then see the links in my signature below.
